Effect of Cu on the strengthening and embrittling of an FeCoNiCr-xCu HEA

被引：45

作者：

Du, Chengchao ^{[1
]}

Hu, Lei ^{[2
,4
]}

Pan, Qiuhong ^{[1
]}

Chen, Kangmin ^{[1
]}

Zhou, Pengjie ^{[3
]}

Wang, Guangjin ^{[5
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang, Jiangsu, Peoples R China

[2] Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan, Anhui, Peoples R China

[3] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang, Jiangsu, Peoples R China

[4] Osaka Univ, Joining & Welding Res Inst, Osaka, Japan

[5] Jiangyin Inst Met Mat Innovat Res, Jiangyin, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2022年 / 832卷

关键词：

High entropy alloy; Cu-rich phase; Deformation; Strength; Plasticity; HIGH-ENTROPY ALLOY; TENSILE PROPERTIES; RICH PHASE; PRECIPITATION; MICROSTRUCTURE; TEMPERATURE; STEELS; DUCTILITY; BEHAVIOR;

D O I：

10.1016/j.msea.2021.142413

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of Cu concentration on the microstructure and mechanical properties of FeCoNiCr-xCu HEAs was investigated. The results showed that low Cu concentrations (less than similar to 5 at. %) contributed to a solid solution strengthening effect. The solid solution Cu atom strengthened the yield strength and ultimate tensile strength together. When the Cu concentration reached approximately 7 at. %, larger numbers of nano Cu-rich particle precipitated from the FCC matrix. The nano Cu-rich particle had a strengthening effect and further increased the yield strength and ultimate tensile strength. When the Cu concentration reached approximately 13 at. %, the weak continuous Cu-rich phase formed between dendrites. The early fracture of the Cu-rich phase dramatically decreased the ultimate tensile strength and elongation.

引用

页数：11

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