The role of copper in transforming CuxCoCrNiAl high-entropy alloys for enhanced strength and ductility

被引：1

作者：

Zhao, Fa-Chang ^{[1
]}

Ji, Guo-Ning ^{[1
]}

Zhao, Xing-Ming ^{[1
]}

Zhao, Rong-Da ^{[1
]}

Wu, Fu-Fa ^{[1
]}

机构：

[1] Liaoning Univ Technol, Sch Mat Sci & Engn, Jinzhou 121001, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2025年 / 223卷

基金：

美国国家科学基金会;

关键词：

High-entropy alloy; Microstructure; Mechanical property; Strength; Ductility; MECHANICAL-PROPERTIES; PHASE-STABILITY; TENSILE PROPERTIES; MICROSTRUCTURE; BEHAVIOR;

D O I：

10.1016/j.matchar.2025.114973

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study conducted a detailed analysis of the microstructure evolution and mechanical properties of a series of CuxCoCrNiAl high-entropy alloys (HEAs) to assess the influence of Cu content on HEAs. The findings indicated that with increasing Cu content, the alloy's phase structure changed from FCC1 + FCC2 (AlCu) + BCC to FCC phase. As the Cu content rose from 20 % to 80 %, the hardness of the alloy decreased progressively from 515 HV to 135 HV, and the ultimate tensile strength reduced from 1335 MPa to 524 MPa. The fracture mechanism shifted from a mixed brittle-ductile fracture to a ductile fracture. Consequently, the Cu4CoCrNiAl HEA (CA50) demonstrated superior overall mechanical properties, with hardness, yield strength, ultimate tensile strength, and elongation measured at 321 HV, 556 MPa, 846 MPa, and 16.4 %, respectively. This research is significant for the advancement of engineering and structural materials with outstanding mechanical properties.

引用

页数：11

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