Microstructure and mechanical properties of AlxSi0.2CrFeCoNiCu1 - x high-entropy alloys

被引：56

作者：

Li, Cheng ^{[1
]}

Xue, Yunfei ^{[1
,2
]}

Hua, Mutian ^{[1
]}

Cao, Tangqing ^{[1
]}

Ma, Lili ^{[1
,3
]}

Wang, Lu ^{[1
,2
]}

机构：

[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[2] Natl Key Lab Sci & Technol Mat Shock & Impact, Beijing 100081, Peoples R China

[3] Qinghai Univ, Sch Chem Engn, Xining 810016, Peoples R China

来源：

MATERIALS & DESIGN | 2016年 / 90卷

基金：

中国国家自然科学基金;

关键词：

High-entropy alloys; Spinodal decomposition; Microstructure; Strain rate; Mechanical properties; SOLID-SOLUTION; BEHAVIOR; ELEMENTS; SYSTEM; HEAT; NB; TI;

D O I：

10.1016/j.matdes.2015.11.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

AlxSi0.2CrFeCoNiCu1 (- x) (x = 0.2, 0.4, 0.5, 0.6, 0.8, 0.9) high-entropy alloys (HEAs) were prepared using vacuum arc melting and injection casting. The microstructures, detailed phases, and strain rate-related mechanical properties of the alloys were investigated. The alloys changed gradually from FCC to coexisting FCC and BCC and then to a BCC solid solution with an increase in the Al content and a decrease in the Cu content. With the Al content increase, the alloys with FCC structures exhibited an increased yield stress but a decreased plasticity. However, the alloys with the BCC structure exhibited both increased strength and plasticity. The improved mechanical properties of alloys are attributed to the combined action of solid-solution strengthening, a decrease in compositional segregation, and fine-grain strengthening. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：601 / 609

页数：9

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