J. Mater. Sci. Technol. ›› 2020, Vol. 39: 1-6.DOI: 10.1016/j.jmst.2019.09.010
• Letter • Next Articles
A.G. Wanga, X.H. Ana*(), J. Gub, X.G. Wangc, L.L. Licd, W.L. Lia, M. Songb*(), Q.Q. Duanc, Z.F. Zhangc, X.Z. Liaoa*()
Received:
2019-06-14
Revised:
2019-08-30
Accepted:
2019-09-02
Published:
2020-02-15
Online:
2020-03-11
Contact:
An X.H.,Song M.,Liao X.Z.
A.G. Wang, X.H. An, J. Gu, X.G. Wang, L.L. Li, W.L. Li, M. Song, Q.Q. Duan, Z.F. Zhang, X.Z. Liao. Effect of grain size on fatigue cracking at twin boundaries in a CoCrFeMnNi high-entropy alloy[J]. J. Mater. Sci. Technol., 2020, 39: 1-6.
Fig. 1. EBSD IPF maps of the CoCrFeMnNi HEA annealed at 1023 K (a), 1273 K (b) and 1473 K (c), respectively. TBs, which were shown with red lines, were seen frequently.
Fig. 2. (a) A typical SEM image shows slip bands passing through TBs as pointed by with arrows and (b) a typical TEM morphology presents planar slips bands as indicated by the black arrows, in the HEA fatigued under a total strain amplitude of 0.4%.
Fig. 3. Typical SEM images of (a) SB cracking and (b) TB cracking in the HEA with intermediate grains fatigued under a total strain amplitude of 0.4% (similar morphologies can be observed in the HEA with fine and coarse grains); (c) A typical IPF map showing the interaction between SBs and TBs (the white areas were not indexed due to the SB or TB cracking or severe extrusion/intrusion); (d) Determination of the slip planes in twin (top) and matrix (bottom) derived from (c) for the calculation of the DSF between matrix and twin.
Fig. 4. (a) Influence of DSF and grain size on the competition between SB cracking and TB cracking in the CoCrFeMnNi HEA; (b) Relationship between the spacing of SBs with extrusions/intrusions and grain size (The inset image demonstrates the measurement of SB spacing in the HEA); (c) Typical SEM images indicate that the SBs spacing increases with grain sizes.
|
[1] | Hongxia Wan, Dongdong Song, Xiaolei Shi, Yong Cai, Tingting Li, Changfeng Chen. Corrosion behavior of Al0.4CoCu0.6NiSi0.2Ti0.25 high-entropy alloy coating via 3D printing laser cladding in a sulphur environment [J]. J. Mater. Sci. Technol., 2021, 60(0): 197-205. |
[2] | Tao Zheng, Xiaobing Hu, Feng He, Qingfeng Wu, Bin Han, Chen Da, Junjie Li, Zhijun Wang, Jincheng Wang, Ji-jung Kai, Zhenhai Xia, C.T. Liu. Tailoring nanoprecipitates for ultra-strong high-entropy alloys via machine learning and prestrain aging [J]. J. Mater. Sci. Technol., 2021, 69(0): 156-167. |
[3] | Byungchul Kang, Taeyeong Kong, Ho Jin Ryu, Soon Hyung Hong. Superior mechanical properties and strengthening mechanisms of lightweight AlxCrNbVMo refractory high-entropy alloys (x = 0, 0.5, 1.0) fabricated by the powder metallurgy process [J]. J. Mater. Sci. Technol., 2021, 69(0): 32-41. |
[4] | Yu Han, Huabing Li, Hao Feng, Kemei Li, Yanzhong Tian, Zhouhua Jiang. Simultaneous enhancement in strength and ductility of Fe50Mn30Co10Cr10 high-entropy alloy via nitrogen alloying [J]. J. Mater. Sci. Technol., 2021, 65(0): 210-215. |
[5] | Ting Xiong, Wenfan Yang, Shijian Zheng, Zhaorui Liu, Yiping Lu, Ruifeng Zhang, Yangtao Zhou, Xiaohong Shao, Bo Zhang, Jun Wang, Fuxing Yin, Peter K. Liaw, Xiuliang Ma. Faceted Kurdjumov-Sachs interface-induced slip continuity in the eutectic high-entropy alloy, AlCoCrFeNi2.1 [J]. J. Mater. Sci. Technol., 2021, 65(0): 216-227. |
[6] | Haoxue Yang, Jinshan Li, Xiangyu Pan, William Yi Wang, Hongchao Kou, Jun Wang. Nanophase precipitation and strengthening in a dual-phase Al0.5CoCrFeNi high-entropy alloy [J]. J. Mater. Sci. Technol., 2021, 72(0): 1-7. |
[7] | Yuan Wu, Fei Zhang, Xiaoyuan Yuan, Hailong Huang, Xiaocan Wen, Yihan Wang, Mengyuan Zhang, Honghui Wu, Xiongjun Liu, Hui Wang, Suihe Jiang, Zhaoping Lu. Short-range ordering and its effects on mechanical properties of high-entropy alloys [J]. J. Mater. Sci. Technol., 2021, 62(0): 214-220. |
[8] | Huhu Su, Xinzhe Zhou, Shijian Zheng, Hengqiang Ye, Zhiqing Yang. Atomic-resolution studies on reactions between basal dislocations and $\left\{ 10\bar{1}2 \right\}$ coherent twin boundaries in a Mg alloy [J]. J. Mater. Sci. Technol., 2021, 66(0): 28-35. |
[9] | Bingqiang Wei, Song Ni, Yong Liu, Min Song. Structural characterization of the {11$\overline 2$2} twin boundary and the corresponding stress accommodation mechanisms in pure titanium [J]. J. Mater. Sci. Technol., 2021, 72(0): 114-121. |
[10] | X.W. Liu, N. Gao, J. Zheng, Y. Wu, Y.Y. Zhao, Q. Chen, W. Zhou, S.Z. Pu, W.M. Jiang, Z.T. Fan. Improving high-temperature mechanical properties of cast CrFeCoNi high-entropy alloy by highly thermostable in-situ precipitated carbides [J]. J. Mater. Sci. Technol., 2021, 72(0): 29-38. |
[11] | Lu Yang, Zhuo Cheng, Weiwei Zhu, Cancan Zhao, Fuzeng Ren. Significant reduction in friction and wear of a high-entropy alloy via the formation of self-organized nanolayered structure [J]. J. Mater. Sci. Technol., 2021, 73(0): 1-8. |
[12] | Yong Hee Jo, Junha Yang, Won-Mi Choi, Kyung-Yeon Doh, Donghwa Lee, Hyoung Seop Kim, Byeong-Joo Lee, Seok Su Sohn, Sunghak Lee. Body-centered-cubic martensite and the role on room-temperature tensile properties in Si-added SiVCrMnFeCo high-entropy alloys [J]. J. Mater. Sci. Technol., 2021, 76(0): 222-230. |
[13] | Yufang Zhao, Jinyu Zhang, YaQiang Wang, Shenghua Wu, Xiaoqing Liang, Kai Wu, Gang Liu, Jun Sun. The metastable constituent effects on size-dependent deformation behavior of nanolaminated micropillars: Cu/FeCoCrNi vs Cu/CuZr [J]. J. Mater. Sci. Technol., 2021, 68(0): 16-29. |
[14] | Yaxin Xu, Wenya Li, Longzhen Qu, Xiawei Yang, Bo Song, Rocco Lupoi, Shuo Yin. Solid-state cold spraying of FeCoCrNiMn high-entropy alloy: an insight into microstructure evolution and oxidation behavior at 700-900 °C [J]. J. Mater. Sci. Technol., 2021, 68(0): 172-183. |
[15] | Hui Jiang, Dongxu Qiao, Wenna Jiao, Kaiming Han, Yiping Lu, Peter K. Liaw. Tensile deformation behavior and mechanical properties of a bulk cast Al0.9CoFeNi2 eutectic high-entropy alloy [J]. J. Mater. Sci. Technol., 2021, 61(0): 119-124. |
Viewed | ||||||
Full text |
|
|||||
Abstract |
|
|||||