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

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