Effects of Nb additions on the microstructure and tribological properties of Al0.25CrFeNi1.75 high-entropy alloy

被引：8
|
作者：
Li, Qinglin [1 ]
Lv, Shuyue
Hu, Xiaowu [2 ]
Lan, Yefeng [1 ]
Liu, JunZhao [1 ]
机构：
[1] Lanzhou Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
[2] Nanchang Univ, Sch Mech & Elect Engn, Nanchang 330031, Peoples R China
来源：
INTERMETALLICS | 2022年 / 151卷
基金：
中国国家自然科学基金;
关键词：
High entropy alloys; Microstructure; Hardness; Tribological properties; MECHANICAL-PROPERTIES; STRUCTURAL STABILITY; HEAT-TREATMENT; TEMPERATURE; EVOLUTION; BEHAVIOR; DESIGN; WEAR; FCC;
D O I：
10.1016/j.intermet.2022.107715
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The microstructure evolution and tribological properties of the Al0.25CrFeNi1.75Nbx (x is molar ratio, x = 0, 0.3, 0.6, 0.66, 0.69, 0.72 and 0.75, denoted by N-b0.3, Nb-0.6, Nb-0.66, Nb-0.69, Nb-0.72, and Nb-0.75, respectively) high entropy alloys (HEAs) were investigated. The results indicated that the microstructure of Al0.25CrFeNi1.75Nbx was composed of orthogonal structure phase of AlCrNi type, Laves phase of FeCrNb type and tetragonal structure phase of AlNi3 type. These alloys shows superior hardness and promising wear resistance. When Nb (the molar ratio of Nb is 0.66) were introduced into Al0.25CrFeNi1.75 alloy, the alloy showed a low wear rate which was 4.2 +/- 0.40 x 10(-4) mm(3) N-1 m(-1), and the hardness reaches 727 HV. The research finding of hardness and tribo-logical properties demonstrated that the addition of Nb can effectively improve the hardness and wear resistance of the Al0.25CrFeNi1.75 alloy.
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页数：10
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