Scholarlink

<p>Given the excellent mechanical properties and satisfactory wear resistance of high-entropy alloys (HEAs), a feasible method is to develop composite materials with excellent mechanical properties and wear resistance as reinforcements for aluminum matrices. In this study, the microstructure and wear behavior of 7075 aluminum-based composites with HEA reinforced by hybrid processes of friction stir processing (FSP), heat treatment, and ultrasonic impact treatment (UIT) were investigated. With the application of mixed processes such as FSP, heat treatment, and UIT, the average coefficient of friction and wear rate of Al-based composites decreased. The microstructure of the composite material in the abrading morphology was assessed by scanning electron microscopy, from which the maximum width of the abraded material was reduced by 2.8, 3.3, and 0.06&#xa0;mm. A decrease in oxygen and an increase in iron in the aluminum-based composites after coupling strengthening were also observed. These experiments validated the positive effects of coupled strengthening on the microstructure and wear behavior of aluminum-based composites with the addition of HEA. The crystal structure of the coupled and strengthened aluminum-based composite material transformed from a single face-centered cubic (FCC) structure to a bidirectional crystal structure of FCC + BCC.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of High-Entropy Alloy Addition on the Microstructure and Wear Behavior of Al-Based Composites Fabricated by Coupling Strengthening

  • 期刊论文

  • 发表日期：

    2025年12月27日

查看全文
  • J. T. Wang,
  • X. C. Li,
  • L. Xie,
  • M. Q. Cong,
  • M. T. He,
  • K. Y. Luo,
  • K. J. Hu,
  • C. M. Casciola,
  • M. Z. Wang

摘要

Given the excellent mechanical properties and satisfactory wear resistance of high-entropy alloys (HEAs), a feasible method is to develop composite materials with excellent mechanical properties and wear resistance as reinforcements for aluminum matrices. In this study, the microstructure and wear behavior of 7075 aluminum-based composites with HEA reinforced by hybrid processes of friction stir processing (FSP), heat treatment, and ultrasonic impact treatment (UIT) were investigated. With the application of mixed processes such as FSP, heat treatment, and UIT, the average coefficient of friction and wear rate of Al-based composites decreased. The microstructure of the composite material in the abrading morphology was assessed by scanning electron microscopy, from which the maximum width of the abraded material was reduced by 2.8, 3.3, and 0.06 mm. A decrease in oxygen and an increase in iron in the aluminum-based composites after coupling strengthening were also observed. These experiments validated the positive effects of coupled strengthening on the microstructure and wear behavior of aluminum-based composites with the addition of HEA. The crystal structure of the coupled and strengthened aluminum-based composite material transformed from a single face-centered cubic (FCC) structure to a bidirectional crystal structure of FCC + BCC.