Concurrently improved strength-ductility synergy and strain-hardenability in metastable face-centered cubic high-entropy alloys through C-doping

被引：0
|
作者：
Zhang, H. [1 ]
Xue, X. Y. [1 ]
Xue, M. J. [1 ]
Li, J. S. [1 ]
Lai, M. J. [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2025年 / 926卷
基金：
中国国家自然科学基金;
关键词：
High entropy alloys; C; -doping; Mechanical properties; Transformation-induced plasticity; Twinning-induced plasticity; MECHANICAL-PROPERTIES; CARBON CONTENT; PLASTICITY; MICROSTRUCTURE; TRANSFORMATION; TEMPERATURE; MARTENSITE; MODEL; TWIP;
D O I：
10.1016/j.msea.2025.147978
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have demonstrated that 1 at.% C-doping enhances both the strength-ductility synergy and strainhardenability of the metastable face-centered cubic (fcc) single-phase Fe50Mn30Cr10Si10 high-entropy alloy (HEA), which exhibits transformation-induced plasticity (TRIP) effect. These enhancements result from interstitial solid solution hardening as well as a beneficial increase in fcc phase stability and stacking fault energy (SFE) due to C-doping. The increased phase stability and SFE activate deformation twinning and the formation of 9R structures, while preserving the TRIP effect. Our findings underscore C-doping as a promising strategy for designing novel high-performance metastable fcc single-phase HEAs.
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页数：6
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