High temperature tribological performance of a cost-effective eutectic high entropy alloy Al0.8CrFeNi2.2: Comparison with AlCoCrFeNi2.1

被引：34
|
作者：
Vo, Tri Dinh [1 ]
Tieu, Anh Kiet [1 ]
Wexler, David [1 ]
Su, Lihong [1 ]
Nguyen, Cuong [1 ]
Yang, Jun [2 ]
Deng, Guanyu [1 ]
机构：
[1] Univ Wollongong, Sch Mech Mat Mechatron & Biomed Engn, Wollongong, NSW 2522, Australia
[2] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2023年 / 184卷
基金：
中国国家自然科学基金; 澳大利亚研究理事会;
关键词：
Eutectic high entropy alloy (EHEA); Cost-effective; Al0; 8CrFeNi2; 2; AlCoCrFeNi2; 1; High temperature nanoindentation; High temperature tribology; MECHANICAL-PROPERTIES; MICROSTRUCTURE; DUCTILITY; STRENGTH; OXIDATION; BEHAVIOR; SOLIDIFICATION; NANOPARTICLES; COCRFEMNNI;
D O I：
10.1016/j.triboint.2023.108445
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A comprehensive comparison study on microstructure, mechanical and high temperature tribological perfor-mance of as-cast Al0.8CrFeNi2.2 and AlCoCrFeNi2.1 eutectic high entropy alloys was conducted. The cost-effective Al0.8CrFeNi2.2 exhibited higher hardness and tensile strength than AlCoCrFeNi2.1. AlCoCrFeNi2.1 showed better friction and wear performances than Al0.8CrFeNi2.2 at RT, but an opposite trend was observed when temperature exceeded 300 oC. Higher Ni content in FCC and BCC(B2) phases of Al0.8CrFeNi2.2 are found to increase the hardness of constitution phases. The tribolayers of Al0.8CrFeNi2.2 at 900 oC composes of distinguished oxide layer and ultrafine-grained particles layer, which are different from the mixing pattern in AlCoCrFeNi2.1. A relatively thicker tribo-layer is also found to enhance the high temperature tribological properties of Al0.8CrFeNi2.2.
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页数：19
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