Ductile-brittle transition of carbon alloyed Fe40Mn40Co10Cr10 high entropy alloys

被引：52
作者：
Chen, L. B. [1 ]
Wei, R. [2 ]
Tang, K. [1 ]
Zhang, J. [1 ]
Jiang, F. [1 ]
Sun, J. [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China
[2] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China
来源：
MATERIALS LETTERS | 2019年 / 236卷
基金：
中国国家自然科学基金;
关键词：
Metals and alloys; Deformation and fracture; High entropy alloys; Phase transformation; Microstructure; Ductile-brittle transition; STRENGTH;
D O I：
10.1016/j.matlet.2018.10.144
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The mechanical behavior of (Fe40Mn40Co10Cr10)(100-x)C-x (x = 0, 2.2, 3.3 at.%) high entropy alloys (HEA) at various temperatures (298 K, 159 K and 77 K) was investigated. For Fe40Mn40Co10Cr10 HEA, the jointly activated twinning and martensitic phase transformation concurrently increase the strength and ductility at 77 K. In contrast, twinning and phase transformation gradually vanish as temperature decreases for carbon alloyed HEAs, resulting in ductile-brittle transition. Our findings indicate that the additional interstitial carbon atoms increase the f.c.c. phase stability, and inhibit the deformability of Fe40Mn40Co10Cr10 HEA at low temperature. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：416 / 419
页数：4
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