Cryo-pre-straining contributes to achieving high yield strength in high-entropy alloys

被引：1

作者：

Tao, Cheng ^{[1
]}

Chen, Chao ^{[1
]}

Fan, Jiarui ^{[1
]}

Luo, Wei ^{[1
]}

Yi, Hailong ^{[1
]}

机构：

[1] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Liaoning, Peoples R China

来源：

INTERMETALLICS | 2024年 / 168卷

基金：

中国国家自然科学基金;

关键词：

High-entropy alloy; Pre-deformation; Microstructure; Mechanical properties; HALL-PETCH RELATIONSHIP; STACKING-FAULT ENERGY; FRICTION STRESS; MICROSTRUCTURE; CRMNFECONI; DEFORMATION; MECHANISMS; TRIP;

D O I：

10.1016/j.intermet.2024.108265

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, we propose an effective and feasible strategy to significantly improve the room-temperature yield strength of the Co35Cr20Fe15Mn15Ni15 HEA by 338%, from 281 MPa (as-recrystallized, before CR) to 1231 MPa (30% CR) through cryo-pre-strain-inducing defects such as dislocations, stacking-faults (SFs), nano-twins, LomerCottrell (L -C) locks, and HCP martensite, while maintaining good ductility (16.4% elongation in 30% CR). Additionally, the contribution of these defects to the yield strength enhancement was quantified. This study offers a new perspective for the preparation of advanced FCC high-entropy alloys.

引用

页数：11

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