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Plasmonic effect augmented S-scheme mechanism in Ag/Ag2O/C3N5 photocatalyst enables efficient photocatalytic degradation of antibiotics Changjun You, Xinlei Zhang, Yiqian Zhao, Ruyu Yan, Yunwang Shen, Qingquan Xue, Wenyao Li, Tong Liu, Jianhui Jiang, Xiaobo Chen, Shijie Li J. Mater. Sci. Technol.    2026, 242 (0): 64-74.   DOI: 10.1016/j.jmst.2025.05.002 Abstract （806）      PDF       Knowledge map    Save Solar-driven catalytic decontamination of emerging organic pollutants is of significance for achieving environmental sustainability. The cardinal challenges in this technology are swift charge carrier reunion, weak redox capability and poor sunlight utilization capacity of photocatalysts. Here, an innovative Ag/Ag2O/C3N5 S-scheme heterojunction photocatalyst with plasmonic effect was developed for antibiotic decontamination by coating Ag/Ag2O nanodots on the surface of C3N5 nanosheets. The localized surface plasmon resonance (LSPR) effect from Ag nanodots augments sunlight response and exciton production. Meanwhile the “nanodots-on-nanosheets” 0D/0D/2D heterostructure with a plasmonic S-scheme interface significantly boosts separation and utilization of highly energetic photo-carriers. As a result, the optimized Ag/Ag2O/C3N5 demonstrates extraordinary stability and achieves a photocatalytic levofloxacin removal rate constant of 0.0278 min-1, which is about 3.9-, 11.6-, and 1.9-fold greater than that of Ag2O, C3N5, and Ag2O/C3N5, respectively. The photocatalytic decontamination mechanism and degradation route of levofloxacin over Ag/Ag2O/C3N5 are elucidated using LC-MS analysis and DFT calculation. This research highlights the potential of LSPR modulated S-scheme heterojunctions as robust photocatalysts for wastewater decontamination, paving the way for innovative solutions to environmental pollution challenges. Reference | Related Articles | Metrics | Comments（0）

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Semi-coherent and coherent nanoprecipitation induced superior strength-ductility combination in additively manufactured CoCrMoW alloy Canjuan Xiao, Weijin Cai, Ruidi Li, Song Ni, Wenting Jiang, Zhangwei Wang, Khurram Yaqoob, Zibin Chen, Yi Huang, Min Song J. Mater. Sci. Technol.    2026, 242 (0): 1-14.   DOI: 10.1016/j.jmst.2025.02.100 Abstract （363）      PDF       Knowledge map    Save The interface coherence between precipitates and the matrix—whether coherent, semi-coherent, or incoherent—significantly impacts both the strength and ductility of metallic materials. An optimal balance between these properties can be achieved through manipulation of the precipitate/matrix interface. In this study, 1 wt.% and 2 wt.% TiN nanoparticles were introduced into a laser powder bed fusion (LPBF) fabricated CoCrMoW alloy as a reinforcing phase. Compared to the unreinforced alloy, the alloy with 1 wt.% TiN exhibited substantial improvements in yield strength, ultimate tensile strength, and fracture elongation, increasing from 876 MPa, 1190 MPa, and 15 % to 1071 MPa, 1421 MPa, and 17 %, respectively. Although the addition of TiN nanoparticles did not significantly affect the average grain size, it inhibited the formation of fine grains at the fusion line and influenced the overall grain size distribution. More importantly, the incorporation of TiN nanoparticles during the LPBF process led to the in-situ formation of semi-coherent precipitates rich in Ti and N, as well as coherent precipitates rich in Ti, N, and O. The semi-coherent precipitates, which exhibit well-defined orientation relationships and periodic misfit dislocations, enhanced strength by blocking stacking faults and ε laths. They also preserved plasticity by promoting self-relaxation through twinning at intersected areas, thus preventing crack nucleation at the interface. Furthermore, the chemical inhomogeneity between the coherent phase and the matrix increased resistance to dislocation cutting of the precipitates, thereby improving the material's strength without compromising ductility. Reference | Related Articles | Metrics | Comments（0）

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Lightweight PBO nanofiber@ZIF-67 derived carbon aerogel with superior electromagnetic wave absorption and thermal insulation Lin Tang, Jing Jiang, Mukun He, Yali Zhang, Qingyi Hu, Xiaolin Liu, Xi Liu, Hua Qiu J. Mater. Sci. Technol.    2026, 244 (0): 186-195.   DOI: 10.1016/j.jmst.2025.05.023 Abstract （347）      PDF       Knowledge map    Save The rapid development of science and technology has led to increasingly severe electromagnetic interference. Aerogel-based electromagnetic wave absorbing materials have demonstrated distinct advantages in addressing these issues, due to their ultra-low density, tunable three-dimensional (3D) network structures, and favorable impedance matching. In this study, ZIF-67 is uniformly incorporated into poly (p-phenylene benzobisoxazole) nanofiber (PNF) aerogels via a combination of sol-gel processing and in situ growth, yielding PNF@ZIF-67 composite aerogels. Subsequent carbonization of the aerogel results in PNF-derived carbon nanofiber@Co/C (CNF@Co/C) aerogels. The 3D porous architecture facilitates multiple internal reflections and enhances electromagnetic wave attenuation, while the presence of Co/C enhances electron mobility and dipole polarization, endowing the CNF@Co/C aerogel with outstanding electromagnetic wave absorption performance. At a carbonization temperature of 800 °C, the CNF@Co/C-800 aerogel exhibits a minimum reflection loss of -60.1 dB at 16.1 GHz, with a corresponding effective absorption bandwidth of 5.84 GHz (ranging from 12.16 to 18.00 GHz). In addition, the CNF@Co/C-800 aerogel possesses low density (37.2 mg/cm3) and low thermal conductivity (0.061 W/(m K)), offering excellent thermal insulation. Furthermore, it demonstrates superior infrared camouflage capability. Owing to these properties, the CNF@Co/C aerogel presents significant potential for applications in aerospace, military equipment, and 5 G communication technologies. Reference | Related Articles | Metrics | Comments（0）

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Integrated structural-functional MXene-GNs/ANF flexible composite film with enhanced thermal conductivity and electromagnetic interference shielding performance Moxi Yele, Gegen Sarula, Jie Yang, Long Yang, Hao Zhang, Longfu Chen, Xiangmei Zhang, Jiahui Wang, Tianyu Wang, Chengzhong Jin, Benliang Liang, Luting Yan J. Mater. Sci. Technol.    2026, 241 (0): 200-210.   DOI: 10.1016/j.jmst.2025.04.014 Abstract （317）      PDF       Knowledge map    Save The development of high-performance structural-functional composites capable of reconciling mechanical robustness with multifunctional integration remains a critical challenge. Inspired by the hierarchical structure of nacre layers, we have created flexible ternary composites featuring an interpenetrating three-dimensional (3D) network of MXene (Ti3C2Tx), graphene nanosheets (GNs), and aramid nanofibers (ANF). This multiscale strategy synergistically combines hydrogen bonding and a nacre-mimetic hierarchical structure with a 3D interpenetrating network, enabled by GNs for interfacial lubrication to overcome the strength-toughness trade-off while facilitating multifunctionality. The optimized MXene-GNs/ANF (60 wt% MXene-GNs, 50:50 ratio, 28 μm thickness) achieves exceptional mechanical properties: tensile strength of 175.10 ± 3.80 MPa, strain at break of 18.56 % ± 0.78 %, toughness of 15.88 ± 0.60 MJ m-3. Simultaneously, it shows an electromagnetic interference shielding effectiveness (EMI SE) of 36.4 dB (8.2-12.4 GHz) and in-plane thermal conductivity (TC) of 11.58 W m-1 K-1. Increasing the thickness to 65 μm further enhances EMI SE to 40.2 dB and TC to 23.21 W m-1 K-1, outperforming most reported analogues. The composite also exhibits excellent thermal stability, with no significant weight loss below 558 °C in the N2 atmosphere, as well as multifunctional properties such as rapid Joule heating (∼160 °C at 4 V), environmental resilience, and flame-retardant fire alert. By harmonizing interfacial interactions and hierarchical structuring, this work provides a scalable route to advanced flexible materials for next-generation wearable electronics and extreme-environment applications requiring integrated mechanical durability EMI shielding, and thermal management. Reference | Related Articles | Metrics | Comments（0）

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Conductor-semiconductor heterointerface polarization enhancement for superior electromagnetic wave absorption Yuelei Pan, Lei Cheng, Di Lan, Siyuan Zhang, Mukun He, Guangrong Wu, Zhenguo Gao, Zirui Jia, Guanglei Wu J. Mater. Sci. Technol.    2026, 244 (0): 129-141.   DOI: 10.1016/j.jmst.2025.05.021 Abstract （287）      PDF       Knowledge map    Save The strategic engineering of conductor-semiconductor heterointerfaces has emerged as a pivotal approach for optimizing microwave attenuation performance. However, challenges persist in comprehensively understanding the synergistic mechanisms between conductor and semiconductor heterointerfaces. This study proposes a novel strategy to enhance polarization relaxation through deliberate heterointerface engineering. A heterostructured composite material consisting of WS2 nanosheet-encapsulated NiCo hollow spheres embedded in porous carbon fibers (WS2@NiCo-hc) was successfully fabricated via an integrated approach combining electrospinning, high-temperature annealing, and solvothermal synthesis. Experimental results demonstrate that the constructed semiconductor (WS2)-conductor (NiCo alloy) heterointerfaces play a pivotal role in synergistic polarization effects. Ultimately, the WS2@NiCo-hc composite exhibits exceptional electromagnetic wave absorption performance at 2.1 mm thickness, achieving a minimum RL of -64.5 dB with an EAB of 6.24 GHz. This work elucidates the structure-property correlation in heterointerface-mediated polarization dynamics, establishing a universal design principle for high-efficiency microwave absorbers via interfacial polarization engineering. Reference | Related Articles | Metrics | Comments（0）

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Enhanced strength-ductility of a Mg-Al-Sn alloy by the synergy of solute segregation and nano-sized precipitates Yun-Peng Meng, Hai-Long Jia, Min Zha, Shi-Chao Wang, Zu-Lai Li, Hui-Yuan Wang J. Mater. Sci. Technol.    2026, 242 (0): 15-27.   DOI: 10.1016/j.jmst.2025.02.094 Abstract （271）      PDF       Knowledge map    Save There is a challenge in preparing dilute magnesium (Mg) alloys with excellent mechanical properties. In the present study, the yield strength (YS) of a Mg-Al-Sn-Ca-Zn-Mn alloy increases significantly (∼93 MPa) by changing the Ca/Zn ratio, while maintaining a good ductility. Particularly, the YS, ultimate tensile strength (UTS), and elongation to fracture (EF) of the Mg-2Al-1Sn-0.5Ca-0.1Zn-0.2Mn (XZ51) alloy reaches ∼321-2+2 MPa, ∼357-5+3 MPa and ∼14.8-0.8+1.4%, respectively. A systematic microstructural investigation indicates that the high YS is principally driven by grain boundary strengthening caused by Al-Ca-Zn co-segregation and nano-sized precipitates. In addition, nano-sized precipitates can effectively inhibit dislocations and thus increase the strength. The type of solute segregation plays a major role in improving YS. When the Al-Zn co-segregation at grain boundaries changes to Al-Ca-Zn co-segregation, the ability of grain boundaries to hinder dislocation slips is significantly enhanced. It forces dislocations to pile up at grain boundaries decorated with Al-Ca-Zn co-segregation, which in turn increases the YS. Additionally, the heavily accumulated dislocations lead to stress concentration at grain boundaries, which effectively facilitates the activation of non-basal slips. This contributes to the improved ductility of the annealed XZ51 alloy. This work presents a reference for elevating mechanical properties of dilute Mg alloys via tailoring GB segregation and nano-sized precipitates. Reference | Related Articles | Metrics | Comments（0）

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Microstructural stability of L12-strengthened Si-modified Fe-Cr-Ni alloy during 510-600 °C thermal aging Yuanfei Su, Shuzhan Zhang, Shengxuan Jiao, Xianbo Shi, Wei Yan, Shenghu Chen, Lijian Rong J. Mater. Sci. Technol.    2026, 244 (0): 246-260.   DOI: 10.1016/j.jmst.2025.05.013 Abstract （270）      PDF       Knowledge map    Save Si-modified austenitic steel for fastener application exhibiting excellent microstructural stability coupled with resistance to liquid lead-bismuth (LBE) corrosion is critical in lead-cooled fast reactors (LFRs), yet Si addition typically compromises high-temperature (>500 °C) thermal stability despite improving corrosion resistance. Herein, we present a novel approach to overcome the historical trade-off between microstructural stability and LBE corrosion resistance in Si-modified austenitic steels, achieved by introducing thermodynamically stable L12 nanoprecipitates into a Si-modified Fe-Cr-Ni alloy via solution and two-step aging (STA) treatment. The STA alloy developed the microstructure consisting of well-dispersed intragranular L12 nanoprecipitates (10.6 ± 2 nm) and discrete intergranular secondary Ni16Ti6Si7 G-phase, resulting in remarkable strength-ductility synergy with a yield strength of 651 ± 16 MPa, ultimate tensile strength of 1094 ± 28 MPa, elongation of 34 % ± 3 %, and acceptable impact toughness of 73 ± 8 J at room temperature. Remarkably, the L12 nanoprecipitates demonstrated exceptional resistance to coarsening during long-term thermal aging at 510-550 °C, maintaining both microstructural and mechanical stability—a critical factor for extending fastener service lifespan in LFRs applications. However, aging at 600 °C for 6000 h caused moderate coarsening of L12 nanoprecipitates (16.3 ± 2.1 nm), leading to a reduction in yield strength to 602 ± 13 MPa. Concurrently, aging-induced embrittlement emerged due to secondary G-phase agglomeration at grain boundaries, resulting in a 55 % reduction in impact toughness. Our findings provide a viable strategy for engineering high-performance Si-modified austenitic steels tailored for LFRs fasteners. Reference | Related Articles | Metrics | Comments（0）

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Organic/inorganic composite S-scheme photocatalyst with enhanced light absorption and H2O2-production activity Libo Wang, Jinsheng Zhao J. Mater. Sci. Technol.    2026, 241 (0): 18-20.   DOI: 10.1016/j.jmst.2025.04.009 Abstract （267）      PDF       Knowledge map    Save Photocatalytic H₂O₂ production from H₂O and O₂ offers a sustainable route but is hindered by the limitations of single-component catalysts, such as narrow light absorption and rapid charge recombination. To address this, an organic/inorganic composite S-scheme heterojunction is constructed through the in-situ growth of In₂S₃ nanosheets on a covalent organic framework (COF), synergistically enhancing light harvesting, carrier separation, and redox capacity. In-situ irradiated XPS, femtosecond transient absorption (fs-TA) spectroscopy, and density functional theory (DFT) calculations jointly reveal the charge transfer dynamics of the COF/In2S3 composite. As a result, the optimized S-scheme heterojunction achieves a remarkable H₂O₂ production rate of 5713.2 µmol g-1 h-1 in pure water. This work advances the design of S-scheme heterojunction design for optimizing COF-based photocatalysts and deepens the understanding of molecular energy-level engineering. Reference | Related Articles | Metrics | Comments（0）

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On the enhanced strength-ductility synergy of magnesium alloy fabricated by laser powder bed fusion with a static magnetic field Xinzhi Li, Xuewei Fang, Jiarong Guo, Binbin Xu, Mugong Zhang, Hongkai Zhang, Ke Huang J. Mater. Sci. Technol.    2026, 242 (0): 138-155.   DOI: 10.1016/j.jmst.2025.04.018 Abstract （266）      PDF       Knowledge map    Save Owing to its inherent poor weldability and high susceptibility to evaporation, it is particularly challenging to fabricate a magnesium (Mg) alloy with superior mechanical properties using laser powder bed fusion (L-PBF). Herein, we describe an external static magnetic field (SMF) assisted L-PBF hybrid process to tailor the internal defects, microstructure, and properties of L-PBF AZ91D Mg alloy. The experimental results show that the electromagnetic braking force and the thermo-electromagnetic convection (TEMC) act together to realize the elimination of vortex flow and the establishment of ordered flow, thus enhancing the surface quality and densification of samples fabricated by this hybrid process. Besides, the thermoelectric current induced by the Seebeck effect creates a thermo-electromagnetic force, which is strong enough for grain refinement and second-phase fragmentation. Meanwhile, the stirring effect of the TEMC around the solid-liquid interface facilitates the migration of solute atoms, thus promoting the precipitation of intragranular nanoparticles. Eventually, the L-PBF AZ91D Mg alloy prepared with a SMF of 0.45 T exhibits an ultimate tensile strength (UTS) of 375 MPa and elongation (EL) up to 7.2 %, representing a 17 % and an 89 % enhancement in the UTS and EL, respectively, as compared to those of the counterparts prepared without SMF. On one hand, the risk of crack nucleation is dramatically minimized by the increased densification and dispersed eutectic-phases. On the other hand, the stable strain hardening rate by dislocation obstruction of dense nanoprecipitates and stress relief of the deformable β-Mg17(Al, Zn)12 intragranular nanoparticles is supposed to account for the enhanced strength-ductility synergy. Our work thus provides a novel insight into defect suppression, microstructure modulation, and performance enhancement of the external SMF assisted L-PBF Mg alloy. Reference | Related Articles | Metrics | Comments（0）

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Role of Sc/Zr in enhancement of η' precipitation and control of microstructure evolution during selective laser melting of Al-Zn-Mg alloys Yueyue Zhu, Wei Pan, Jinming Fan, Xiaoyu Huang, Linfei Shuai, Andrew Godfrey, Tianlin Huang, Mingxing Zhang, Yongzhong Zhang, Xiaoxu Huang J. Mater. Sci. Technol.    2026, 243 (0): 45-58.   DOI: 10.1016/j.jmst.2025.03.089 Abstract （262）      PDF       Knowledge map    Save A detailed comparison of the microstructures formed during selective laser melting (SLM) of an Al-Zn-Mg alloy with and without (Sc,Zr) additions has been carried out. A key observation is that during SLM, additions of Sc and Zr not only act directly to promote grain nucleation, but also act indirectly by stimulating the formation of η' phase precipitates. Depth-dependent analysis of the microstructure in the final printed layers shows that a columnar/equiaxed-grain bimodal microstructure forms during melt-pool solidification in the alloy without (Sc,Zr) addition. However, subsequent thermal cycling from overprinted layers results in significant grain growth, leading to the development of coarse columnar grains with 〈001〉 parallel to the build direction. In contrast, for the alloy with (Sc,Zr) additions, a fine-scale bimodal grain structure forms during melt pool solidification, and moreover remains stable throughout the subsequent thermal cycling, due to the presence of η' phase precipitates at grain boundaries with a density one order of magnitude higher than in the (Sc,Zr)-free alloy. The investigation highlights the importance of understanding the interaction between solidification and in-situ annealing with regard to microstructural control during the SLM process. Reference | Related Articles | Metrics | Comments（0）

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Ti35Zr35Nb10Hf20-xTax high-entropy alloys with exceptional performance as biomedical load-bearing materials Jiakun Wang, Liang Zhu, Minghang Zhou, Lingti Kong, Jinfu Li J. Mater. Sci. Technol.    2026, 241 (0): 298-310.   DOI: 10.1016/j.jmst.2025.02.096 Abstract （254）      PDF       Knowledge map    Save Achieving a balance between mechanical compatibility and biocompatibility in biomedical load-bearing metallic materials has long been a significant challenge. In this study, the d-electron alloy design theory in combination with the first-principles calculation and the calculation of phase diagrams was employed to design novel high-entropy alloys composed entirely of non-toxic elements for biomedical applications. By accurately tuning the parameters $ \overline{B o}$ and $ \overline{M d}$ to control the phase stability, as-cast Ti-Zr-Nb-Hf-Ta biomedical high-entropy alloys with remarkably low Young’s modulus, high yield strength, and large fracture elongation were developed without the need for intricate post-processing steps. The alloys are composed of single metastable β phase with an inhomogeneous distribution of elements at the nanoscale in it. The feature of metastable β phase and the binding energy approaching 0 eV/atom among the component atoms determine the low Young’s modulus, while the high strength is mainly related with the solid solution strengthening and the presence of HfTa-rich clusters that can pin the movement of dislocations effectively, resulting in the excellent strength-ductility synergy. This work provides new insights into the development of biomedical load-bearing implant materials through multicomponent design. Reference | Related Articles | Metrics | Comments（0）

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Multiphase Co/Ni metal nitrides with heterointerfaces for enhanced interfacial polarization loss in electromagnetic wave absorption Zhiqiang Guo, Junwen Ren, Xianzhen Xu, Di Lan, Siyuan Zhang, Mukun He,Zhenguo Gao, Zirui Jia,Guanglei Wu J. Mater. Sci. Technol.    2025, 236 (0): 19-27.   DOI: 10.1016/j.jmst.2025.03.020 Abstract （252）      PDF       Knowledge map    Save Metal nitrides exhibit excellent properties and application potential as electromagnetic wave (EMW) ab-sorbing materials. Their high conductivity and adjustable dielectric properties allow them to effectively attenuate EMW. However, the current research on the synergistic effect of metal nitrides is scarce and has limited applications in the field of EMW absorption. In this work, Co/Ni metal-nitride fiber composites with multiphase structures were constructed by electrostatic spinning and multiphase composite process. The synergistic loss mechanism of multiphase structure and N atomic modulation is explored by modu-lating the components and microstructure of the materials. By constructing the multiphase composites, the controllable tuning of non-homogeneous interfaces and the enhanced interfacial polarization loss ef-fect were achieved. Electrochemical impedance spectroscopy was used to analyze the charge transfer ca-pability at the interface of multiphase Co/Ni metal nitride fiber composites. Through the controllable reg-ulation of the multiphase structure, the Co/Ni bimetallic nitride fiber composite (Co5.47 N/Ni4 N/CF) exhib-ited the strongest polarization loss capability, achieving a minimum reflection loss (RLmin ) of-43.82 dB and a maximum effective absorption bandwidth (EABmax ) of 7.04 GHz. This study provides a valuable reference for multiphase composites in the field of EMW absorption by exploring the polarization loss mechanism of Co/Ni metal nitride multiphase materials. Reference | Related Articles | Metrics | Comments（0）

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Fabrication of high-performance (TiC + (TiZr)5Si3)/TA15 composites via spark plasma extrusion Qiang Wang, Zhao-Hui Zhang, Xing-Wang Cheng, Xiao-Tong Jia, Yang-Yu He, Jin-Zhao Zhou, Yuan-Hao Sun J. Mater. Sci. Technol.    2026, 244 (0): 142-148.   DOI: 10.1016/j.jmst.2025.05.018 Abstract （251）      PDF       Knowledge map    Save To address the room-temperature brittleness of (TiC + (TiZr)5Si3)/TA15 composites, this study introduces a novel thermomechanical approach—spark plasma extrusion (SPE). The microstructure and mechanical properties of the extruded samples were systematically evaluated. The extruded composites exhibited a yield strength of 1267 MPa, an ultimate tensile strength of 1383 MPa, and an elongation of 7.0 %, all markedly superior to those of the as-sintered counterparts. The enhanced ductility is attributed to the more homogeneous distribution of TiC and (TiZr)5Si3 reinforcements and the activation of additional 〈c + a〉 dislocations during deformation. Furthermore, at 600, 650, and 700 °C, the tensile strengths of the extruded composites reached 840, 652 , and 480 MPa, respectively, representing increases of 75.9 %, 53.1 %, and 44.0 % over the TA15 alloy. During high-temperature tensile tests, matrix softening facilitated greater ductility, with dislocation slip identified as the dominant deformation mechanism. This study provides a new and feasible approach for the fabrication of high-strength, high-ductility titanium matrix composites. Reference | Related Articles | Metrics | Comments（0）

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Manipulating interfacial charge redistribution in Mn0.5Cd0.5S/N-rich C3N5 S-scheme heterojunction for high-performance photocatalytic removal of emerging contaminants Deyun Ma, Qingquan Xue, Yanping Liu, Fenglan Liang, Wenyao Li, Tong Liu, Chunqiang Zhuang, Zaiwang Zhao, Shijie Li J. Mater. Sci. Technol.    2026, 243 (0): 265-274.   DOI: 10.1016/j.jmst.2025.05.011 Abstract （249）      PDF       Knowledge map    Save Engineering advanced S-scheme heterojunction photocatalysts represents a prospective strategy for efficient antibiotic-contaminated wastewater decontamination. However, the practical realization of such systems is hindered by difficulties in achieving seamless interfacial integration and precise control over charge-carrier dynamics. Herein, we proposed a shell-core 0D/2D Mn0.5Cd0.5S/C3N5 S-scheme heterojunction with compact interfacial contact, synthesized by in-situ solvothermal growth of Mn0.5Cd0.5S nanodots on C3N5 nanosheets. This optimized Mn0.5Cd0.5S/C3N5 heterojunction performs extraordinary catalytic performance and enables approximately 1.3- and 3.2-fold tetracycline abatement rate greater than that for Mn0.5Cd0.5S and C3N5, respectively, which arises from the synergy of efficient spatial photo-carrier separation and well preserved great redox capacity of the heterojunction enabled by the S-scheme mechanism. Mechanistic validation was achieved through systematic characterizations and computational analyses. This study advances the rational design of shell-core S-scheme heterojunctions for photocatalytic antibiotic wastewater treatment. Reference | Related Articles | Metrics | Comments（0）

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Effect of heat treatment on microstructure evolution, strengthening-toughening and corrosion behavior of high-strength LA103Z Mg-Li alloy fabricated by wire-arc additive manufacturing Dengke Liu, Xuewen Zong, Pengsheng Xue, Zhongtang Gao, Yan Zhang, Hongzhi Zhou, Bingheng Lu J. Mater. Sci. Technol.    2026, 243 (0): 115-128.   DOI: 10.1016/j.jmst.2025.01.092 Abstract （241）      PDF       Knowledge map    Save This study investigated the effects of heat treatment on the mechanical and corrosion properties of cold metal transfer-based wire arc additively manufactured (CMT-WAAM) LA103Z magnesium-lithium alloy. The results demonstrated that both solid solution treatment and aging treatment improved the mechanical properties of the alloy, while the corrosion resistance of the solid solution-treated alloy was significantly enhanced. The solid solution treatment (340 °C) dissolved the fine needle-like α-Mg and AlLi phases, and the Li2MgAl phase precipitates were dispersed. The ultimate tensile strength of the solution-treated alloy increased significantly from 144 ± 6.2 MPa to 299 ± 1.2 MPa, an increase of almost 107.6%. The high-temperature (225 °C) aging treatment made the alloy grain distribution more uniform, caused the AlLi phase particles to gradually coarsen, and transformed the Li2MgAl phase into a substantial quantity of fine AlLi phase particles. The yield strength increased from 100 ± 5.0 MPa to a maximum of 182 ± 2.6 MPa, representing an approximately 82% increase, while the maximum elongation reached 24.1% ± 2.0%. The electrochemical test results showed that the fine equiaxed grains and uniformly distributed fine needle-like α-Mg phase in the As-built sample reduced micro galvanic corrosion sensitivity and enhanced corrosion resistance compared to the rolled sample. The AlLi phase particles in the solid solution-treated sample were nearly completely dissolved, leading to a significant reduction in micro-galvanic corrosion between the secondary phases and the matrix. Corrosion primarily occurred along the interface between the α-Mg and β-Li phases, exhibiting filamentary corrosion, and the sample showed the highest corrosion resistance. In contrast, the samples subjected to direct high-temperature aging and solution treatment followed by aging exhibited exacerbated local corrosion due to the coarsening of the AlLi phase and the increased amount of precipitation. Reference | Related Articles | Metrics | Comments（0）

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Machine learning-based interatomic potential for simulating irradiation damage mechanisms in ZrC Chang-jie Ding, Xiao-yang Wang, Xiang-yan Li, Wei-shu Yang, Xiao-lin Li, Yan-ge Zhang, Yi-chun Xu, Chang-song Liu, Xuebang Wu J. Mater. Sci. Technol.    2026, 242 (0): 75-91.   DOI: 10.1016/j.jmst.2025.02.098 Abstract （238）      PDF       Knowledge map    Save Molecular dynamics simulation of irradiation damage is critical for understanding microstructural evolution and defect formation in zirconium carbide (ZrC). However, the absence of a suitable interatomic potential remains a challenge. Here, we develop a precise deep-neural-network based machine learning interatomic potential tailored for investigating irradiation damage in ZrC. Our model accurately reproduces the energetics and kinetics of native point defects, thermodynamics properties, surface energies, and generalized stacking fault energies. We further explore collision cascades spanning a range of primary knock-on atom energies (from 1 keV to 40 keV), types (C and Zr), and directions (〈100〉, 〈010〉, and 〈111〉) at 300 K. The results reveal carbon interstitial atoms and vacancies as the dominant point defects, consistent with first-principles calculations, with the notable formation of carbon-rich clusters within collision cascades. These carbon-rich defect clusters, resembling “black-dot” structures in experimental observations, emerge directly in collision cascades and remain thermodynamically stable at low temperatures due to the low mobility of Zr interstitial atoms. In contrast to the absence of dislocation loops in the collision cascade simulations, our results suggest a thermally-driven mechanism for the formation and transformation of 1/3 〈111〉 and 1/2 〈110〉 dislocation loops. This work enriches our understanding of the irradiation damage mechanism in ZrC and other carbide ceramics. Reference | Related Articles | Metrics | Comments（0）

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Stepwise cooling spinning to achieve isotropic strength-ductility synergy of titanium alloy tube Z.X. Xie, X.G. Fan, L. Wang, M. Zhan, F. Ma J. Mater. Sci. Technol.    2026, 244 (0): 156-172.   DOI: 10.1016/j.jmst.2025.03.106 Abstract （236）      PDF       Knowledge map    Save To obtain high-strength titanium alloy thin-walled tubes, a new stepwise cooling spinning process was proposed, which involved multi-pass spinning with deformation temperature gradually reduced from the β phase region to the two-phase region. A setup for stepwise cooling was established, and Ti-6Al-4V thin-walled tubes with an ultimate strength of 1245 MPa and elongation of 7.51 % along the rolling direction (RD) were successfully prepared via 5-pass spinning with a total thinning ratio of 80 %. The microstructure, texture, and mechanical properties evolution in stepwise cooling spinning were analyzed. It is found that the stepwise cooling spinning results in a fine equiaxed structure, of which the primary α is strengthened by dislocation structures and the β phase is strengthened by precipitation of secondary α. Formation and deformation of the lamellar α weaken the overall texture but cause a local texture with 〈0001〉 // RD after the 3rd pass spinning. Meanwhile, the deformation of globularized α in the subsequent spinning results in two weak texture components with 〈0001〉 // normal direction (ND) and 〈0001〉 ⊥ ND. Thus, the strength and anisotropy of the tube increase with spinning passes, and then decrease. Reference | Related Articles | Metrics | Comments（0）

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Lattice match-enabled Zn3In2S6@CdS S-scheme heterojunction with S covalent bond bridge for simultaneous H2O2 photosynthesis and H2 production Yu Che, Ke Wang, Cong Wang, Bo Weng, Shifu Chen, Sugang Meng J. Mater. Sci. Technol.    2026, 243 (0): 228-236.   DOI: 10.1016/j.jmst.2025.04.030 Abstract （230）      PDF       Knowledge map    Save The key to realizing artificial photosynthesis of hydrogen peroxide coupled with hydrogen generation lies in the construction of efficient bifunctional photocatalysts. Herein, we have successfully prepared core-shell Zn3In2S6@CdS (ZIS@CdS) S-scheme heterojunction with matched interfacial lattices and S covalent bonding bridges by ion-exchange method. The combination of density functional theory calculations and experimental tests exhibit that the ZIS@CdS heterojunction interface with a lattice mismatch of ∼5 % and the presence of two S covalent bonding forms, which provides stable and efficient channels for photogenerated charge transfer. Moreover, the photogenerated charges at the ZIS@CdS heterojunction interface follow the S-scheme transfer pathway, enabling spatial charge separation and high redox potentials. Under the synergistic effect of the matched interfacial lattice, covalent bond bridges, and built-in electric field, the ZIS@CdS heterojunction achieves an impressive H2 evolution rate of 195.9 µmol g-1 h-1 and H2O2 production rate of 92.0 µmol g-1 h-1 without the need of sacrificial agent and oxygen bulging, respectively. This work verifies that coupling lattice matching and covalent bonding is an effective strategy for constructing efficient bifunctional photocatalysts. Reference | Related Articles | Metrics | Comments（0）

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HOF/COF 2D/2D S-scheme heterojunction for photocatalytic H2 production Zhigang Wang, Chuanbiao Bie J. Mater. Sci. Technol.    2026, 243 (0): 206-208.   DOI: 10.1016/j.jmst.2025.04.028 Abstract （227）      PDF       Knowledge map    Save Photocatalysis, a carbon-neutral catalytic technology, has emerged as a cornerstone in the pursuit of sustainable hydrogen production. A recent breakthrough reports the efficacy of a metal-free 2D/2D S-scheme heterojunction comprising a hydrogen-bonded organic framework (HOF) and a pyrene-based covalent organic framework (COF) for solar-driven hydrogen evolution. Capitalizing on structurally matched pyrene building blocks, the HOF/COF interface achieves atomic-level alignment, amplifying the internal electric field intensity while enhancing π-π conjugation across the heterojunction. These synergistic effects drive directional S-scheme charge transfer and suppress carrier recombination, yielding a high hydrogen production rate with excellent stability. This work establishes a paradigm for designing organic S-scheme photocatalysts through interfacial engineering, advancing the frontier of metal-free photocatalysts for solar-to-fuel conversion. Reference | Related Articles | Metrics | Comments（0）

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Effect of proton irradiation on ferrite microstructure in aged 308L stainless steel Xiaofeng Yang, Yuanfei Li, Jianchao Peng, Xue Liang, Wenqing Liu, Xiangbing Liu, Hefei Huang J. Mater. Sci. Technol.    2026, 244 (0): 180-185.   DOI: 10.1016/j.jmst.2025.04.025 Abstract （223）      PDF       Knowledge map    Save To investigate the microscopic changes in the ferrite phase of the 308 L stainless steel matrix under service conditions, the welding material was first aged at 400 °C for 5000 h, followed by 240 keV proton irradiation at the same temperature. Transmission electron microscopy (TEM) and atom probe tomography (APT) were used to characterize the ferrite phase as a function of irradiation damage and depth. The results indicate that, after thermal aging, the G phase forms within the ferrite phase and spinodal decomposition occurs simultaneously. Irradiation leads to an increase in the size of the G phase and the formation of NiSi clusters due to irradiation-induced segregation. The size and number density of NiSi clusters increase with increasing irradiation dose. However, no significant changes in the degree of spinodal decomposition are observed. Reference | Related Articles | Metrics | Comments（0）

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Enhancement of high-temperature performance in titanium alloys through rapid heating: A novel boundary engineering approach Wentao Chen, Kehuan Wang, Gang Liu J. Mater. Sci. Technol.    2026, 245 (0): 249-255.   DOI: 10.1016/j.jmst.2025.05.014 Abstract （220）      PDF       Knowledge map    Save How to upgrade the comprehensive performance in high-temperature titanium alloys is a long-lasting topic in the industry due to the inherent cost and time limitations of conventional methods. In this study, a novel boundary engineering approach utilizing rapid heating and aging (RHA) is proposed for the commercial Ti60 alloy. By fabricating a heterogeneous microstructure comprising submicron-sized lamellar α phase (αm), nanosized lamellar α phase (αn) and multiscale silicides, the RHA-treated alloy achieved an exceptional combination of strength and ductility at both 600 °C and room temperature. Compared with the initial material, the ultimate tensile strength (UTS) and creep rupture life were significantly enhanced. The greatly enhanced performance is predominantly attributed to grain boundary strengthening of refined lamellar α phase and multiscale silicides. The present work provides a novel strategy to unlock the potential of existing titanium alloys for extreme-temperature applications. Reference | Related Articles | Metrics | Comments（0）

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Achieving a saturated tensile strength of face-centered cubic Al2.5Ti2.5(CoCrFeNi)95 high-entropy alloy via severe cold drawing Zheng Tian, Lichu Zhou, Caijuan Shi, Runguang Li, Fei Yang, Yiping Xia, Xiaodan Zhang, Jianqing Jiang, Feng Fang J. Mater. Sci. Technol.    2026, 244 (0): 173-179.   DOI: 10.1016/j.jmst.2025.04.042 Abstract （218）      PDF       Knowledge map    Save Pursuing higher strength is an eternal topic for metallic materials, however, single-phase face-centered cubic (FCC) metallic materials are weak in strength. In this work, Al2.5Ti2.5(CoCrFeNi)95 high-entropy alloy (HEA) wires are fabricated with a saturated tensile strength at 2.3 GPa, one of the highest in the field of single-phase FCC metal. The heavily drawn wires possess an ultra-fine heterogeneous microstructure consisting of nanotwin-embedded nanograins and dislocation-decorated long fiber grains. The drawing-induced grain refinement stagnates from the strain around 7 with an average grain size of 33 nm and an aspect ratio of 3.5. Grain boundary motion dominates the dynamic balance of the ultra-fine microstructure feature in the HEA wire during the drawing process. The strengthening mechanism of the wire is also revealed based on microstructural parameters obtained by statistical TEM observation and high-energy synchrotron XRD. The present work provides a basic understanding of the strength limit and its microstructural feature for single-phase FCC HEA. Reference | Related Articles | Metrics | Comments（0）

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Development of CoCrNi-based alloys: Insights into elemental doping and additive manufacturing Yiying Zhu, Bailin Wang, Huancai Li, Guijun Bi, Guiyong Xiao, Chuanzhong Chen, Xianghai An, Fei Weng J. Mater. Sci. Technol.    2026, 245 (0): 88-109.   DOI: 10.1016/j.jmst.2025.05.025 Abstract （216）      PDF       Knowledge map    Save CoCrNi-based medium-entropy alloys (MEAs) exhibit exceptional mechanical properties, making them promising candidates for advanced applications. Currently, most of the studies focus on CoCrNi-based alloys prepared by traditional techniques, where a combination of casting and thermo-mechanical treatment is employed to achieve a synergy of strength and ductility. However, this approach is complex and unsuitable for fabricating components with complex geometries. In contrast, laser additive manufacturing (LAM) has gained considerable attention as an innovative method to fabricate MEAs, offering a near-net-shape fabrication approach with precise microstructural control. Currently, comprehensive reviews on CoCrNi-based alloys are still limited, with few addressing the impact of LAM on these alloys. In this paper, we review the effect of elemental doping on CoCrNi-based alloys, focusing on strengthening mechanisms, recrystallization behavior, and stacking fault energy (SFE). Additionally, this review highlights the influence of LAM on CoCrNi-based alloys and compares the mechanical properties of alloys produced via traditional processing routes and LAM. Finally, the future outlook for optimizing LAM-processed (LAMed) CoCrNi-based alloys is discussed, offering insights into future research and development directions. Reference | Related Articles | Metrics | Comments（0）

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Manipulating grain boundary migration to fabricate integral core-shell structure with enhanced strain hardening in Ni-based high-entropy alloy Hyojin Park, Qingfeng Wu, Yoon-Uk Heo, Sun Ig Hong, Rae Eon Kim, Do Won Lee, Soung Yeoul Ahn, Zhe Gao, Jae Heung Lee, Hyo Moon Joo, Jongun Moon, Young-Sang Na, Jae-il Jang, Hyoung Seop Kim J. Mater. Sci. Technol.    2026, 242 (0): 213-225.   DOI: 10.1016/j.jmst.2025.04.017 Abstract （216）      PDF       Knowledge map    Save A core-shell microstructure represents an approach to achieve superior mechanical properties in alloys through its distinctive architecture, typically developed in powder metallurgy processing. In the present study, an integral core-shell structure has achieved in a cast Ni-based high entropy alloy through a straightforward thermo-mechanical processing (TMP) approach, including hot rolling and heat treatment. Inspired by the formation of a necklace structure during the hot deformation, we employed hot rolling to induce bulged grain boundaries in coarse grains. Subsequent heat treatment constrained the growth of these bulged regions through B2 precipitate formation, leading to the stabilization of the integral core-shell structure, where the deformed grains form the core, and the bulged grains form the shell. The significant synergistic hardening from the microstructural heterogeneity of the integral core-shell structure improves strain hardening in the TMP-processed sample. The integrated TMP approach, combined with alloy design, enables the evolution of integral core-shell structures in cast high entropy alloys, significantly improving material properties without the complexities of powder metallurgy. Reference | Related Articles | Metrics | Comments（0）

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Achieving high strength and ductile eutectic high-entropy alloy with directional lamellar via laser additive manufacturing Abdukadir Amar, Mingliang Wang, Rui Huang, Lingkun Zhang, Yiping Lu J. Mater. Sci. Technol.    2025, 235 (0): 70-80.   DOI: 10.1016/j.jmst.2025.03.013 Abstract （216）      PDF       Knowledge map    Save Developing high-strength and ductile metallic parts with designable shapes is an unfading research topic for material science and engineering. As a revolutionary technology, additive manufacturing (AM) provides a new pathway for producing complex-shaped metallic parts with the possibility of in situ tailoring their microstructure. However, AM is not always ideally applicable for all metals and alloys. Eutectic high entropy alloys (EHEAs) contain both the advantages of the eutectic alloys and high entropy alloys (HEAs), and EHEAs show significant potential in AM due to their excellent mechanical properties and good fluidity. Herein, heterogeneous and ultra-fine eutectic lamellar microstructure with directional growth along the deposition direction (DD) was obtained by adjusting the process parameters of AM to improve the strength and ductility of EHEAs. Compared with the as-cast sample, the simultaneous increment in both strength and ductility is achieved by AM. Combination of strength and ductility of the AM sample tensile along the DD direction (yield strength σy=1115 MPa, ultimate tensile strength σUTS =1417 MPa, ultimate tensile strain εU=23 %) in this work was superior to most of the additive manufactured alloys and comparable to the thermomechanical-treated EHEAs with the best mechanical properties. The high strength and good ductility of the AM were mainly attributed to the ultra-fine lamellar nature and fully constrained soft and hard lamellar microstructure, which produces an obvious hetero-deformation induced (HDI) strengthening and high crack buffering effect during the deformation. This work provides a new possibility to achieve high strength and ductile complex-shaped metallic parts via designing directional lamellar eutectic structures by AM. Reference | Related Articles | Metrics | Comments（0）

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Synergistic multi-heteroatom doping in carbon nitride: Harnessing a giant built-in electric field for enhanced photocatalytic H2O2 generation Fan Fan, Hao Xiu, Huiting Ma, Yuting Wang, Yongpeng Cui, Wenqing Yao, Yajun Wang J. Mater. Sci. Technol.    2026, 242 (0): 128-137.   DOI: 10.1016/j.jmst.2025.02.091 Abstract （215）      PDF       Knowledge map    Save Efficient separation and rapid migration of photogenerated charges are crucial for achieving high photocatalytic H2O2 production. In this study, a K, P, and O co-doped carbon nitride (KPOCN-x) was synthesized through simple one-pot polymerization for efficient photocatalytic H2O2 production. The synergistic doping of metal and non-metal elements enhances light absorption and simultaneously promotes both in-plane and interplane photogenerated charge transfer. Induced by multi-heteroatom doping, especially the form of K bridging, the built-in electric field of KPOCN-5 increases up to 2.27 times that of undoped polymeric carbon nitride (Bulk CN), facilitating the efficient separation of photogenerated charges. Meanwhile, the rod-shaped structure shortens the migration distances of photogenerated charges, further promoting electron transfer and minimizing recombination. As a result, the H2O2 production rate of KPOCN-5 reached 3306.6 µmol g-1 h-1 under visible light, approximately 50 times higher than that of Bulk CN. This work highlights the construction of a giant built-in electric field as a powerful strategy for boosting the photocatalytic production of H2O2. Reference | Related Articles | Metrics | Comments（0）

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Enhanced thermal stability and mechanical properties of an additively manufactured CoCrNiFeMn high entropy alloy Jiayi Sun, Zhiqiang Wu, Zhiguang Zhu, Mui Ling Sharon Nai, Xianghai An J. Mater. Sci. Technol.    2025, 237 (0): 115-127.   DOI: 10.1016/j.jmst.2025.03.030 Abstract （214）      PDF       Knowledge map    Save High entropy alloys (HEAs), particularly CoCrNiFeMn system, have emerged as a transformative class of high-performance alloys due to their exceptional mechanical and functional properties. However, traditional manufacturing methods for HEAs are limited by inefficiencies and high costs, restricting their widespread applications. Additive manufacturing (AM), specifically laser powder bed fusion (LPBF), offers a promising alternative by enabling the fabrication of HEAs with unique microstructures and enhanced properties. This study investigates the thermal stability and mechanical performance of LPBF-printed CoCrNiFeMn HEA across a wide temperature range. The as-built LPBF HEA with a hierarchically heterogeneous microstructure, featured by columnar grains and ultrafine dislocation cellular structure, demonstrates exceptional thermal stability, with minimal hardness reduction and no apparent recrystallisation even after prolonged exposure to high temperatures (up to 1373 K), in stark contrast to the significant property degradation observed in conventionally processed HEAs. This stability is attributed to the unique dislocation cellular structures and the intrinsic thermal self-stabilizing effects induced by the LPBF process and the inhibition of recrystallisation due to the low stored energy and columnar grain morphology. The LPBF-fabricated HEA also exhibits outstanding strength-ductility synergy across a broad temperature spectrum, with cryogenic deformation enhancing both strength and ductility due to the activation of deformation twinning. At elevated temperatures, the alloy undergoes a slight reduction in strength but retains good ductility, except at 873 K, where a sharp decline in ductility is observed likely due to grain boundary decohesion and porosity-related crack initiation manifested by the cleavage fracture surface and the cracks at grain boundaries. These findings provide new insights into the temperature-dependent mechanical behavior of AM HEAs, highlight the critical role of dislocation cellular structures in achieving superior thermal and mechanical performance, and underscore the potential of additively manufactured HEAs with tailored microstructures for extreme environments. Reference | Related Articles | Metrics | Comments（0）

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Effect of Laves-decorated dendrite structure on hydrogen embrittlement in selective laser-melted nickel-based alloy Zhao Xu, Yujie Zhu, Saiyu Liu, Weipeng Li, Jiacheng Chen, Kewei Gao, Rongjian Shi, Xiaolu Pang J. Mater. Sci. Technol.    2025, 239 (0): 1-15.   DOI: 10.1016/j.jmst.2025.03.051 Abstract （211）      PDF       Knowledge map    Save The effects of the Laves-decorated dendrite structure on the hydrogen-assisted cracking behavior of the SLM-718 alloy were investigated. The Laves phase exhibits a hydrogen desorption activation energy of 47.67 ± 7.85 kJ mol-1. The results of in situ scanning Kelvin probe force microscopy and hydrogen microprint technique provide direct evidence of the hydrogen trapping by the Laves phase. The high-density dendrite walls consisting of entangled dislocations exhibit an inhibitory effect on hydrogen diffusion. Atomic-scale characterization reveals that dislocation stacking at the Laves/γ-matrix interface induces the formation of dislocation defects and a high-stress concentration in the Laves phase. The presence of hydrogen further promotes the formation of micropore defects and the embrittlement of the Laves phase. Hydrogen-promoted dislocation slip localization and hydrogen-induced reduction of interatomic bonding are the primary reasons for the Laves phase fracture and debonding at the Laves/γ-matrix interface. The coalescence of micropore defects ultimately leads to hydrogen-induced crack formation. Reference | Related Articles | Metrics | Comments（0）

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Double-layer electromagnetic shielding materials with microcellular structure for strong absorption and low reflection Zixuan Wang, Li Ma, Haoyu Ma, Menglong Xu, Xiaoxiao Wu, Dongxing Zhang, Chul B. Park, Jun Wang J. Mater. Sci. Technol.    2026, 245 (0): 227-237.   DOI: 10.1016/j.jmst.2025.04.056 Abstract （207）      PDF       Knowledge map    Save Given the rapid development in information and communication technologies, there is a pressing need for efficient, broadband, and lightweight shielding materials that emphasize electromagnetic (EM) wave absorption. Traditional single-layer material faces challenges such as limited absorption and secondary reflective pollution. To address the issues, we constructed a double-layer composite structure composed of a microcellular absorption layer comprised of multi-walled carbon nanotube (MWCNT)/flake iron powder (Fe)/poly (vinylidene fluoride) (PVDF) and a highly conductive solid MWCNT/PVDF (20/80 vol.%) layer. By controlling the composition of MWCNT/Fe in PVDF and the void fraction (VF) using supercritical carbon dioxide foaming, the impedance matching and the EM attenuation capability of the absorption layer were effectively adjusted. A reflection loss (RL) as low as -60 dB and an effective absorption bandwidth of 3.44 GHz were obtained for MWCNT/Fe/PVDF (5/10/85 vol.%) with a VF of 75 %. By combining the absorption and shielding layers, an average total shielding effectiveness of 41.75 dB and reflectivity of 0.12 across the X-band were achieved with a thickness of only 3 mm. The employment of metallic magnetic micro-particles improves impedance matching due to their high saturation magnetization and ease of integration with the dielectric material MWCNT. The combination of the microcellular structure and the highly conductive layer allowed for the decoupling of impedance matching, attenuation, and shielding, resulting in an “absorption-reflection-reabsorption” pathway for dissipating EM energy. The heterogeneously structured double-layer composite with excellent shielding efficiency and low reflection characteristics presents a promising strategy for developing next-generation high-performance, absorption-dominant EM interference shielding materials. Reference | Related Articles | Metrics | Comments（0）

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A machine learning strategy to achieve dual-synchronous property improvement of aviation Al-Cu-Mg alloy Hao Hu, Fan Zhao, Wei Yong, Lei Jiang, Zhihao Zhang, Jianxin Xie J. Mater. Sci. Technol.    2026, 244 (0): 208-230.   DOI: 10.1016/j.jmst.2025.04.036 Abstract （206）      PDF       Knowledge map    Save Synchronously improving the ultimate tensile strength (UTS) and elongation (EL) of Al-Cu-Mg alloys at both room and high temperatures (dual-synchronous property improvement) is an important approach to meet the lightweight development requirements of aviation high-end equipment. However, it is very challenging because of the complicated composition of aluminum alloys and distinct strengthening phases at different temperatures. Here we propose a machine learning strategy that enables dual-synchronous improvement of UTS and EL at both room and high temperatures. First, feature selection is used to identify the key alloy factors affecting the UTS and EL of the alloy. Then, machine learning prediction models are developed with key alloy factors and temperature as inputs, while UTS or EL are outputs, respectively. Finally, a utility function of Bayesian optimization is constructed for simultaneously considering four target properties, including UTS and EL at room temperature (RT) and 200 °C, and dual-synchronous improvement is realized based on a genetic algorithm. The designed new alloy has a composition of Al-4.3Cu-1.7Mg-0.5Mn-0.5Zn-0.2Zr-0.2Cr-0.1Ti (wt.%). At RT, the measured UTS, yield strength (YS), and EL of the new alloy C1 samples are 577±4 MPa, 411±4 MPa, and 18.0 %±0.5 %, respectively. At 200 °C, the UTS, YS, and EL of the new alloy C1 samples are 458±7 MPa, 364±8 MPa, and 19.3 %±0.9 %, respectively. Compared to the currently leading AA2524 alloy, the UTS of the new alloy at RT and 200 °C is increased by 19 % and 24 %, the YS is increased by 7 % and 25 %, and the EL is improved by >1/4 and 1/5, respectively. In the new alloy C1, nanoscale S phases with a volume fraction of 4.3 % and the multiple twinned T phases with a volume fraction of 3.1 % result in excellent strength and elongation at both room and high temperatures. Reference | Related Articles | Metrics | Comments（0）