Microstructure, thermodynamics and compressive properties of AlCrCuNixTi (x=0, 1) high entropy alloys

被引：14
|
作者：
Wang, X. -R. [1 ,2 ]
He, P. [1 ]
Lin, T. -S. [1 ]
Wang, Z. -Q. [3 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
[2] Lanzhou Jiaotong Univ, Sch Mech Engn, Lanzhou 730010, Peoples R China
[3] Lanzhou Jiaotong Univ, Sch Railway Technol, Lanzhou 730010, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2015年 / 31卷 / 15期
基金：
中国国家自然科学基金;
关键词：
Mixing enthalpy matrix; High entropy alloy; Microstructure; Thermodynamics; Mechanical properties; PHASE-STABILITY; SOLID-SOLUTION; COATINGS; ELEMENTS; SOLIDIFICATION; BEHAVIOR;
D O I：
10.1179/1743284715Y.0000000101
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Two equiatomic high entropy alloys, AlCrCuNixTi ( x = 0, 1), were prepared by an arc furnace. Their microstructure, thermodynamics and compressive properties were investigated in as- cast state. The AlCrCuTi alloy consists of a face centred cubic (fcc) phase, two body centred cubic ( bcc) phases and an Al4Cu9-like phase, while the AlCrCuNiTi alloy contains an fcc phase and two bcc phases. Thermodynamic expressions based on mixing enthalpy matrix facilitate the thermodynamic calculation. The element Cr takes severe segregation during solidification and forms Cr rich phases in both alloys. The addition of Ni to the AlCrCuNiTi alloy inhibits the formation of intermetallic compounds and enhances the yield strength, compressive strength and ultimate strain, but degrades Vickers hardness.
引用
收藏
页码：1842 / 1849
页数：8
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