Microstructure and mechanical properties of (FeCoNiCr)100-xMnx non-equiatomic high-entropy alloys

被引：0

作者：

Zhao K. ^{[1
]}

Ai T.-T. ^{[1
,2
]}

Feng X.-M. ^{[1
,2
]}

Wang P.-J. ^{[1
]}

Bao W.-W. ^{[1
,2
]}

Li W.-H. ^{[1
,2
]}

Kou L.-J. ^{[1
,2
]}

Dong H.-F. ^{[1
,2
]}

Zou X.-Y. ^{[1
,2
]}

Deng Z.-F. ^{[1
,2
]}

Zhao Z.-G. ^{[1
,2
]}

机构：

[1] School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong

[2] National & Local Joint Engineering Laboratory for Environmental Protection Technology for Comprehensive Utilization of Slag, Shaanxi University of Technology, Hanzhong

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2022年 / 32卷 / 05期

关键词：

Annealing twin; High-entropy alloy; Mechanical properties; Microstructure; Second phase strengthening;

D O I：

10.11817/j.ysxb.1004.0609.2021-37902

中图分类号：

学科分类号：

摘要：

The Non-equiatomic (FeCoNiCr)100-xMnx(x=0, 12, 20) high-entropy alloys were studied. The results indicate that (FeCoNiCr)100-xMnx alloys containing Mn prepared by vacuum hot pressing sintering present dual-phase microstructure compose of the face centered cubic (FCC)/body centered cubic (BCC) phases, in which a lot of nanometer intermetallic compounds precipitate. The (FeCoNiCr)88Mn12 alloy after annealed at 650 ℃ for 1 h has the best comprehensive mechanical properties, with compressive yield strength of 873.65 MPa, ultimate compressive strength of 1813.98 MPa, fracture strain of 41.03%, flexural strength of 1573.69 MPa and fracture toughness of 49.45 MPa•m1/2. The excellent comprehensive mechanical properties are attributed to the second phase strengthening effect of BCC phases and a large number of annealing twins form in the low stacking fault energy region. The design concept of TWIP-assisted non-equiatomic dual-phase high-entropy alloys can provide a new idea for the composition design of high-entropy alloys. © 2022, China Science Publishing & Media Ltd. All right reserved.

引用

页码：1351 / 1359

页数：8

共 27 条

[21] XIA Ze-bang, CHEN Wei-ping, JIANG Zhen-fei, Et al., Microstructure and mechanical properties of Fe28Ni28Mn28Cr8Cu8 and Fe28Ni28Mn28Cr8Al8 high entropy alloys prepared by powder metallurgy, The Chinese Journal of Nonferrous Metals, 30, 5, pp. 1049-1056, (2020)
[22] WU B Y, CHEN W P, JIANG Z F, Et al., Influence of Ti addition on microstructure and mechanical behavior of a FCC-based Fe30Ni30Co30Mn10 alloy, Materials Science and Engineering A, 676, pp. 492-500, (2016)
[23] SUWAS S, RAY R K., Crystallographic texture of materials, (2014)
[24] ARGON A S., Strengthening mechanisms in crystal plasticity, (2008)
[25] CARTER C B, HOLMES S M., The stacking-fault energy of nickel, The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics, 35, 5, pp. 1161-1172, (1977)
[26] SUN S J, TIAN Y Z, LIN H R, Et al., Temperature dependence of the Hall-Petch relationship in CoCrFeMnNi high-entropy alloy, Journal of Alloys and Compounds, 806, pp. 992-998, (2019)
[27] AN X H, WU S D, WANG Z G, Et al., Significance of stacking fault energy in bulk nanostructured materials: insights from Cu and its binary alloys as model systems, Progress in Materials Science, 101, pp. 1-45, (2019)

← 1 2 3 →