Enhanced strength-ductility synergy in ferrous medium-entropy alloys via single-step hot rolling

被引：0
|
作者：
Liao, Yu [1 ]
Song, Yisi [1 ]
Shu, Nan [1 ]
Niu, Yunjiao [1 ]
Zhang, Hao [1 ]
Sun, Beier [1 ]
Wang, Yiwei [1 ]
Li, Chuanwei [1 ,2 ]
Gu, Jianfeng [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Inst Mat Modificat & Modelling, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Shanghai Key Lab Mat Laser Proc & Modificat, Shanghai 200240, 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：
Ferrous medium-entropy alloys; Hot rolling; Transformation-induced plasticity; Microstructure; Mechanical properties; DEFORMATION-BEHAVIOR; MICROSTRUCTURE;
D O I：
10.1016/j.msea.2025.147920
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The present study investigated the microstructure and mechanical properties of as-hot-rolled Fe64(CoCrNi)36 (at. %) ferrous medium-entropy alloys (Fe-MEAs), demonstrating a remarkable 142 % enhancement in yield strength (YS) and a superior uniform elongation of 43.0 %, in comparison to the cold-rolled and annealed ones. The improvement of YS is attributed to dislocation strengthening, grain boundary strengthening, and hot rollinginduced defects such as stacking faults and Lomer-Cottrell (L-C) locks. Due to the enhanced yield stress, the pronounced transformation-induced plasticity (TRIP) effect supported the sustained uniform plastic deformation. These findings underscore hot rolling as an effective and straightforward strategy to reinforce Fe-MEAs.
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页数：8
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