Grain refining mechanism and strength-ductility trade-off of NbC-reinforced FeCoNiCrMn HEA

被引：3
|
作者：
Wang, Ruotian [1 ]
Du, Chengchao [1 ]
Zhang, Qingsong [1 ]
Liu, Jiawei [1 ]
Ren, Xudong [2 ]
机构：
[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Jiangsu, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2024年 / 915卷
关键词：
FCC-Typed HEA; NbC particle; Strength; Elongation; Fracture; HIGH-ENTROPY ALLOYS; TENSILE PROPERTIES; MICROSTRUCTURE; COMPOSITES;
D O I：
10.1016/j.msea.2024.147290
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The strength-ductility trade-off has long challenged FCC-typed HEAs. This paper presents a NbC-reinforced FeCoNiCrMn HEA with ultra-fine grain and nano NbC particle. Its ultimate tensile strength and elongation are 853.7 +/- 7.3 MPa and 57.8 +/- 1.9 %, respectively. The combination of high temperature solid solution at 1180 degrees C, cold rolling, and low temperature annealing at 1050 degrees C contributes to the generation of nano-sized NbC particles on the high-density grain boundary (GB) and sub-GB of rolled microstructure. The almost uniformly distributed nano-sized NbC particles deeply hinders the grain growth and contributes to the ultra-fine grain of NbCreinforced HEA. It sheds new insights into understanding the way to refine grain and precipitate of NbCreinforced FCC-typed HEA and its effect on strength-ductility trade-off.
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收藏
页数：7
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