Tensile deformation behavior and mechanical properties of a bulk cast Al0.9CoFeNi2 eutectic high-entropy alloy

doi:10.1016/j.jmst.2020.05.053

Abstract

Abstract:

In this study, a new Al_0.9CoFeNi₂ eutectic high entropy alloy (EHEA) was designed, and the microstructures as well as the deformation behavior were investigated. The bulk cast Al_0.9CoFeNi₂ EHEA exhibited an order face-centered cubic FCC (L1₂) and an order body-centered cubic (B2) dual-phase lamellar eutectic microstructure. The volume fractions of FCC (L1₂) and B2 phases are measured to be 60 % and 40 %, respectively. The combination of the soft and ductile FCC (L1₂) phase together with the hard B2 phase resulted in superior strength of 1005 MPa and ductility as high as 6.2 % in tension at room temperature. The Al_0.9CoFeNi₂ EHEA exhibited obvious three-stage work hardening characteristics and high work-hardening ability. The evolving dislocation substructures during uniaxial tensile deformation found that planar slip dominates in both FCC (L1₂) and B2 phases, and the FCC (L1₂) phase is easier to deform than the B2 phase. The post-deformation transmission electron microscopy revealed that the sub-structural evolution of the FCC (L1₂) phase is from planar dislocations to bending dislocations, high-density dislocations, dislocation network, and then to dislocation walls, and Taylor lattices, while the sub-structural evolution of the B2 phase is from a very small number of short dislocations to a number of planar dislocations. Moreover, obvious ductile fracture in the FCC (L1₂) phase and a brittle-like fracture in the B2 phase were observed on the fracture surface of the Al_0.9CoFeNi₂ EHEA. The research results provide some insight into the microstructure-property relationship.

Key words: Eutectic high-entropy alloy, Microstructure, Mechanical properties, Deformation behavior

Hui Jiang, Dongxu Qiao, Wenna Jiao, Kaiming Han, Yiping Lu, Peter K. Liaw. Tensile deformation behavior and mechanical properties of a bulk cast Al_0.9CoFeNi₂ eutectic high-entropy alloy[J]. J. Mater. Sci. Technol., 2021, 61: 119-124.

Figures/Tables 6

Fig. 1. (a) XRD pattern, (b) EBSD phase mapping and (c-e) TEM micrographs and SAED patterns.

Table 1 Compositions of the as-cast Al0.9CoFeNi2 alloy by EDS (at.%).

Regions	Al	Co	Fe	Ni
FCC	15.29	23.23	23.38	38.1
BCC	27.73	16.53	15.37	40.37

Fig. 2. (a) Tensile stress-strain curve of the Al0.9CoFeNi2 EHEA, (b) true stress and strain hardening rate (dσ/dε) against true strain curves of the Al0.9CoFeNi2 EHEA and (c) low and (d) high magnification SEM images of the tensile fracture surface of the Al0.9CoFeNi2 EHEA at room temperature.

Fig. 3. TEM micrographs of the Al0.9CoFeNi2 alloy at a strain of 0.6 % during tensile deformation: (a) dislocation pileup and (b) dislocations configurations in the FCC (L12) phase.

Fig. 4. TEM micrographs of the Al0.9CoFeNi2 alloy at a strain of 1.5 % during tensile deformation: (a) dislocations configurations in the FCC (L12) phase; (b) slip band; (c) dislocation pileup; (d) intersecting dislocation; (e) dislocation networks.

Fig. 5. TEM micrographs of the Al0.9CoFeNi2 alloy after tensile fracture: (a) dislocations configurations in the FCC (L12) phase; (b) dislocations configurations in the B2 phase.

References 30

[1]	J.W. Yeh, S.K. Chen, S.J. Lin, J.Y. Gan, T.S. Chin, T.T. Shun, C.H. Tsau, S.Y. Chang, Adv. Eng. Mater. 6 (2004) 299-303. DOI URL
[2]	B. Cantor, I.T.H. Chang, P. Knight, A.J.B. Vincent, Mater. Sci. Eng. A 375-377 (2004) 213-218. DOI URL
[3]	Z. Li, S. Zhao, R.O. Ritchie, M.A. Meyers, Prog. Mater. Sci. 102 (2019) 296-345. DOI URL
[4]	M.C. Gao, J.W. Yeh, P.K. Liaw, Y. Zhang, High Entropy Alloys Fundamentals and Applications, Springer International Publishing, Switzerland, 2016.
[5]	Y. Zhang, T.T. Zuo, Z. Tang, M.C. Gao, K.A. Dahmen, P.K. Liaw, Z.P. Lu, Prog. Mater. Sci. 61 (2014) 1-93. DOI URL
[6]	Z. Li, K.G. Pradeep, Y. Deng, D. Raabe, C.C. Tasan, Nature 534 (2016) 227-230. DOI URL PMID
[7]	Q. Yu, Z.W. Shan, J. Li, X. Huang, L. Xiao, J. Sun, E. Ma, Nature 463 (2010) 335-338. URL PMID
[8]	B. Gludovatz, A. Hohenwarter, D. Catoor, E.H. Chang, E.P. George, R.O. Ritchie, Science 345 (2014) 1153-1158. URL PMID
[9]	Y.P. Lu, Y. Dong, S. Guo, L. Jiang, H.J. Kang, T.M. Wang, B. Wen, Z.J. Wang, J.C. Jie, Z.Q. Cao, H.H. Ruan, T.J. Li, Sci. Rep. 4 (2014) 6200. DOI URL PMID
[10]	S. Guo, C. Ng, C.T. Liu, J. Alloys. Compd. 557 (2013) 77-81. DOI URL
[11]	H. Jiang, L. Jiang, D.X. Qiao, Y.P. Lu, T.M. Wang, Z.Q. Cao, T.J. Li, J. Mater, Sci. Technol. 33 (2017) 712-717.
[12]	H. Jiang, K.M. Han, X.X. Gao, Y.P. Lu, Z.Q. Cao, M.C. Gao, J.A. Hawk, T.J. Li, Mater. Des. 142 (2018) 101-105. DOI URL
[13]	Y.P. Lu, H. Jiang, S. Guo, T.M. Wang, Z.Q. Cao, T.J. Li, Intermetallics 91 (2017) 124-128. DOI URL
[14]	H. Jiang, H.Z. Zhang, T.D. Huang, Y.P. Lu, T.M. Wang, T.J. Li, Mater. Des. 109 (2016) 539-546. DOI URL
[15]	Y.M. Tan, J.S. Li, J. Wang, H.C. Kou, Intermetallics 85 (2017) 74-79. DOI URL
[16]	B. Gwalani, S. Gangireddy, Y. Zheng, V. Soni, R.S. Mishra, R. Banerjee, Sci. Rep. 9 (2019) 6371. DOI URL PMID
[17]	X. Chen, J.Q. Qi, Y.W. Sui, Y.Z. He, F.X. Wei, Q.K. Meng, Z. Sun, Mater. Sci. Eng. A 681 (2017) 25-31. DOI URL
[18]	X. Jin, Y. Zhou, L. Zhang, X.Y. Du, B.S. Li, Mater. Des. 143 (2018) 49-55. DOI URL
[19]	X. Jin, Y. Zhou, L. Zhang, X.Y. Du, B.S. Li, Mater. Lett. 216 (2018) 144-146. DOI URL
[20]	Q.F. Wu, Z.J. Wang, T. Zheng, C. Da, Z.S. Yang, J.J. Li, J.J. Kai, J.C. Wang, Mater. Lett. 253 (2019) 268-271. DOI URL
[21]	Ł. Rogal, J. Morgiel, Z. Świątek, F. Czerwiński, Mater. Sci. Eng. A 651 (2016) 590-597. DOI URL
[22]	F. He, Z.J. Wang, P. Cheng, Q. Wang, J.J. Li, Y.Y. Dang, J.C. Wang, C.T. Liu, J. Alloys. Compd. 656 (2016) 284-289. DOI URL
[23]	W.Y. Huo, H. Zhou, F. Fang, Z.H. Xie, J.Q. Jiang, Mater. Des. 134 (2017) 226-233. DOI URL
[24]	P. Shi, W. Ren, T. Zheng, Z. Ren, X. Hou, J. Peng, P. Hu, Y. Gao, Y. Zhong, P.K. Liaw, Nat. Commun. 489 (2019) 1-5.
[25]	Y.P. Lu, X.Z. Gao, L. Jiang, Z.N. Chen, T.M. Wang, J.C. Jie, H.J. Kang, Y.B. Zhang, S. Guo, H.H. Ruan, Y.H. Zhao, Z.Q. Cao, T.J. Li, Acta Mater. 124 (2017) 143-150. DOI URL
[26]	H. Jiang, D.X. Qiao, Y.P. Lu, Z. Ren, Z.Q. Cao, T.M. Wang, T.J. Li, Scr. Mater. 165 (2019) 145-149. DOI URL
[27]	T. Yang, Y.L. Zhao, Y. Tong, Z.B. Jiao, J. Wei, J.X. Cai, X.D. Han, D. Chen, A. Hu, J.J. Kai, K. Lu, Y. Liu, C.T. Liu, Science 362 (2018) 933-937. DOI URL PMID
[28]	L. Zhang, R. Song, C. Zhao, F. Yang, Mater. Sci. Eng. A 640 (2015) 225-234. DOI URL
[29]	X.Z. Gao, Y.P. Lu, B. Zhang, N.N. Liang, G.Z. Wu, G. Sha, J.Z. Liu, Y.H. Zhao, Acta Mater. 141 (2017) 59-66. DOI URL
[30]	X. Feaugas, Acta Mater. 47 (1999) 3617-3632. DOI URL

Tensile deformation behavior and mechanical properties of a bulk cast Al_0.9CoFeNi₂ eutectic high-entropy alloy

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 6

References 30

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	Pengfei Ji, Bohan Chen, Bo Li, Yihao Tang, Guofeng Zhang, Xinyu Zhang, Mingzhen Ma, Riping Liu. Influence of Nb addition on microstructural evolution and compression mechanical properties of Ti-Zr alloys [J]. J. Mater. Sci. Technol., 2021, 69(0): 7-14.
[2]	Xiang Peng, Shihao Xu, Dehua Ding, Guanglan Liao, Guohua Wu, Wencai Liu, Wenjiang Ding. Microstructural evolution, mechanical properties and corrosion behavior of as-cast Mg-5Li-3Al-2Zn alloy with different Sn and Y addition [J]. J. Mater. Sci. Technol., 2021, 72(0): 16-22.
[3]	Xiao Zhang, Pei Wang, Dianzhong Li, Yiyi Li. Multi-scale study on the heterogeneous deformation behavior in duplex stainless steel [J]. J. Mater. Sci. Technol., 2021, 72(0): 180-188.
[4]	Wen Zhang, Lei Chen, Chenguang Xu, Wenyu Lu, Yujin Wang, Jiahu Ouyang, Yu Zhou. Densification, microstructure and mechanical properties of multicomponent (TiZrHfNbTaMo)C ceramic prepared by pressureless sintering [J]. J. Mater. Sci. Technol., 2021, 72(0): 23-28.
[5]	Yinling Zhang, Zhuo Chen, Shoujiang Qu, Aihan Feng, Guangbao Mi, Jun Shen, Xu Huang, Daolun Chen. Multiple α sub-variants and anisotropic mechanical properties of an additively-manufactured Ti-6Al-4V alloy [J]. J. Mater. Sci. Technol., 2021, 70(0): 113-124.
[6]	Zhihong Wu, Hongchao Kou, Nana Chen, Zhixin Zhang, Fengming Qiang, Jiangkun Fan, Bin Tang, Jinshan Li. Microstructural influences on the high cycle fatigue life dispersion and damage mechanism in a metastable β titanium alloy [J]. J. Mater. Sci. Technol., 2021, 70(0): 12-23.
[7]	Yanli Lu, Yi Wang, Yifan Wang, Meng Gao, Yao Chen, Zheng Chen. First-principles study on the mechanical, thermal properties and hydrogen behavior of ternary V-Ni-M alloys [J]. J. Mater. Sci. Technol., 2021, 70(0): 83-90.
[8]	Xiaojie Zhou, Yuan Yao, Jian Zhang, Xiaomin Chen, Weiying Huang, Jing Pan, Haoran Wang, Maopeng Weng. A high-performance Mg-4.9Gd-3.2Y-1.1Zn-0.5Zr alloy via multidirectional forging after analyzing its compression behavior [J]. J. Mater. Sci. Technol., 2021, 70(0): 156-167.
[9]	Qingqing Li, Yong Zhang, Jie Chen, Bugao Guo, Weicheng Wang, Yuhai Jing, Yong Liu. Effect of ultrasonic micro-forging treatment on microstructure and mechanical properties of GH3039 superalloy processed by directed energy deposition [J]. J. Mater. Sci. Technol., 2021, 70(0): 185-196.
[10]	R. Liu, P. Zhang, Z.J. Zhang, B. Wang, Z.F. Zhang. A practical model for efficient anti-fatigue design and selection of metallic materials: II. Parameter analysis and fatigue strength improvement [J]. J. Mater. Sci. Technol., 2021, 70(0): 250-267.
[11]	Xiong-jie Gu, Wei-li Cheng, Shi-ming Cheng, Yan-hui Liu, Zhi-feng Wang, Hui Yu, Ze-qin Cui, Li-fei Wang, Hong-xia Wang. Tailoring the microstructure and improving the discharge properties of dilute Mg-Sn-Mn-Ca alloy as anode for Mg-air battery through homogenization prior to extrusion [J]. J. Mater. Sci. Technol., 2021, 60(0): 77-89.
[12]	Xiaopei Wang, Yoshiaki Morisada, Hidetoshi Fujii. Flat friction stir spot welding of low carbon steel by double side adjustable tools [J]. J. Mater. Sci. Technol., 2021, 66(0): 1-9.
[13]	Young-Kyun Kim, Kyu-Sik Kim, Young-Beum Song, Jung Hyo Park, Kee-Ahn Lee. 2.47 GPa grade ultra-strong 15Co-12Ni secondary hardening steel with superior ductility and fracture toughness [J]. J. Mater. Sci. Technol., 2021, 66(0): 36-45.
[14]	Xiaoxiao Li, Meiqiong Ou, Min Wang, Long Zhang, Yingche Ma, Kui Liu. Effect of boron addition on the microstructure and mechanical properties of K4750 nickel-based superalloy [J]. J. Mater. Sci. Technol., 2021, 60(0): 177-185.
[15]	Yunsheng Wu, Xuezhi Qin, Changshuai Wang, Lanzhang Zhou. Microstructural evolution and its influence on the impact toughness of GH984G alloy during long-term thermal exposure [J]. J. Mater. Sci. Technol., 2021, 60(0): 61-69.