Microstructure and wear resistance of an intermetallic-based Al0.25Ti0.75CoCrFeNi high entropy alloy

被引：57

作者：

Gwalani, Bharat ^{[1
,2
]}

Ayyagari, Aditya V. ^{[2
]}

Choudhuri, Deep ^{[1
]}

Scharf, Thomas ^{[1
,2
]}

Mukherjee, Sundeep ^{[1
,2
]}

Gibson, Mark ^{[3
,4
]}

Banerjee, Rajarshi ^{[1
,2
]}

机构：

[1] Univ North Texas, Adv Mat & Mfg Proc Inst, Denton, TX 76207 USA

[2] Univ North Texas, Dept Mat Sci & Engn, Denton, DC 76207 USA

[3] CSIRO Mfg, Private Bag 10, Clayton, Vic 3169, Australia

[4] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2018年 / 210卷

关键词：

High entropy alloy; Chi phase; Huesler phase; Wear; Intermetallic; PHASE; AL0.3COCRFENI; STABILITY; BEHAVIOR;

D O I：

10.1016/j.matchemphys.2017.06.034

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An Al0.25Ti0.75CoCrFeNi high entropy alloy (HEA), consisting of multiple principal elements, forms the uncommonly observed chi-phase, which is a large lattice parameter intermetallic phase based on the body centered cubic crystal structure, as the matrix phase and a L2(1) phase (ordered Huesler phase, X(2)YZ-type based on the face-centered cubic structure) as a major secondary phase. Additionally, a face centered cubic phase with a high density of nano-twins is also present in the microstructure as a third phase. The extremely high Vicker's hardness of the matrix chi phase (1090Hv +/- 14) and of the L2(1) phase (570 +/- 9 H-V) along with low sliding coefficient of friction (similar to 03) and low wear rate (similar to 12 x 10(-5) mm(3)/ N m) makes this HEA a promising candidate for mechanical wear-resistant applications. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：197 / 206

页数：10

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