Effect of Ultrasonic Surface Rolling Extrusion on the Wear Resistance of CoCrFeMnNiM (M=Ti, Mo) High-entropy Alloy Coatings

被引：0
|
作者：
Liu H. [1 ,2 ,3 ]
Gao Q. [1 ,2 ,3 ]
Dai J. [1 ]
Li X. [1 ]
Yang H. [1 ]
Han J. [1 ]
Hao J. [1 ,2 ,3 ]
机构：
[1] School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou
[2] Jiangsu Province and Education Ministry Co-sponsored Collaborative Innovation Center of Intelligent Mining Equipment, Xuzhou
[3] Jiangsu Key Laboratory of Mine Electromechanical Equipment, Xuzhou
来源：
Zhongguo Biaomian Gongcheng/China Surface Engineering | 2022年 / 35卷 / 06期
基金：
中国国家自然科学基金;
关键词：
high-entropy alloy; laser cladding; microstructure; ultrasonic surface rolling extrusion; wear resistance;
D O I：
10.11933/j.issn.1007-9289.20220303002
中图分类号：
学科分类号：
摘要：
The poor hardness and wear properties of CoCrFeMnNi high-entropy alloy (HEA) greatly limit its application in surface engineering, so the enhanced CoCrFeMnNiM (M=Ti, Mo) high-entropy alloy coatings are prepared by laser cladding, and the surface is then processed using ultrasonic surface rolling extrusion (USRE). The microstructure and mechanical properties (residual stress, microhardness, wear resistance) of the coatings are investigated. The results show that Ti-doping leads to the TiC precipitation in the CoCrFeMnNi coating, while the CoCrFeMnNiMo coating is still comprised of a single FCC solid solution phase. USRE treatment reduces the surface roughness, and increases the residual compressive stress and microhardness of the HEA coatings. Besides, USRE treatment has a more significant effect on the CoCrFeMnNiMo coating. After USRE treatment with the same processing parameters, the volume wear rate of the CoCrFeMnNiTi HEA coating declines from 1.90×10−4 mm3 / (N·m) to 0.71×10−4 mm3 / (N· m). However, the wear rate of CoCrFeMnNiMo HEA coating increases due to the change in wear mechanism and the increase of surface brittleness. The applicability of USRE treatment to HEA coatings is discussed, which provides a reference for wear resistance enhancement of HEA coatings. © 2022 Chinese Mechanical Engineering Society. All rights reserved.
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页码：107 / 115
页数：8
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