Effect of Al addition on the microstructure, mechanical and wear properties of TiZrNbHf refractory high entropy alloys

被引：183

作者：

Bhardwaj, Vipul ^{[1
]}

Zhou, Qing ^{[1
]}

Zhang, Fan ^{[1
]}

Han, Weichao ^{[1
]}

Du, Yin ^{[1
]}

Hua, Ke ^{[1
]}

Wang, Haifeng ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Ctr Adv Lubricat & Seal Mat, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

来源：

TRIBOLOGY INTERNATIONAL | 2021年 / 160卷

关键词：

Refractory high entropy alloys; Mechanical properties; Wear properties; Microstructure; TRIBOLOGICAL PERFORMANCE; BEHAVIOR; ALUMINUM; TEMPERATURE; PHASES; COCRFEMNNI; STABILITY; EVOLUTION;

D O I：

10.1016/j.triboint.2021.107031

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A series of AlxTiZrNbHf refractory high entropy alloys (RHEAs) were prepared to investigate the mechanical and wear properties. Despite the different crystal structures of each constituent, the RHEAs exhibited body centered cubic (BCC) phase structures as revealed by X-ray diffraction and transmission electron microscopy. Along with the primary BCC phase, another ordered BCC phase appeared in AlTiZrNbHf, being supported by a high negative mixing enthalpy (<-16.28 kJ-mol(-1)) and a low valence electron concentration (< 4.04). The improved mechanical properties and wear resistance by the Al addition are ascribed to severe lattice distortion and second phase strengthening. These findings highlight significant alterations in the microstructure, mechanical and wear properties with the Al addition, which are beneficial to the design of alloys for wear applications.

引用

页数：11

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