Scholarlink

<p>To further extend the application range of Al–Cu–Mg alloys, FeCoCrNiAl<sub>0.5</sub>Ti<sub>0.5</sub> high-entropy alloy particles (HEAp) were introduced into an Al–Cu–Mg matrix by stir casting. In contrast to previous studies mainly focusing on individual properties of HEAp-reinforced aluminum matrix composites, this work systematically investigates the effects of FeCoCrNiAl<sub>0.5</sub>Ti<sub>0.5</sub> HEAp content on the microstructure, tensile properties, wear behavior, and corrosion performance of cast Al–Cu–Mg composites. The results show that increasing the HEAp content gradually changed the particle distribution from relatively uniform dispersion to agglomeration. Meanwhile, the microhardness increased continuously, whereas the ultimate tensile strength (UTS) first increased and then decreased. The composite with 2&#xa0;wt.% HEAp exhibited the most uniform particle distribution and achieved the highest UTS of 389 ± 9&#xa0;MPa, which was 6.4% higher than that of the matrix alloy. This improvement was mainly attributed to thermal mismatch strengthening, load transfer strengthening, and Orowan strengthening. In friction and wear tests, the 2&#xa0;wt.% HEAp/Al–Cu–Mg composite showed a 13–16% reduction in wear rate and an 8–11% reduction in coefficient of friction (COF) compared with the matrix alloy, mainly because HEAp can bear part of the applied load, provide a lubricating effect, and promote the formation of a mechanically mixed layer (MML). In electrochemical corrosion tests, the composite also exhibited better corrosion resistance than the matrix alloy. Overall, this work provides guidance for the design of HEAp-reinforced Al–Cu–Mg composites for potential applications in wear- and corrosion-related service environments.</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

Microstructure, mechanical properties, wear behavior, and corrosion behavior of Al–Cu–Mg composites reinforced with FeCoCrNiAl0.5Ti0.5 high-entropy alloy particles

  • 期刊论文

  • 发表日期：

    2026年7月29日

查看全文
  • Rui Huang,
  • Fangjia Dou,
  • Yingdi Zhang,
  • Yongqi Wang,
  • Jiangnan Xia,
  • Zhengwei Tang,
  • Dongshuai Zhou,
  • Jian Wang,
  • Yu Zhang,
  • Zhihao Bai

摘要

To further extend the application range of Al–Cu–Mg alloys, FeCoCrNiAl0.5Ti0.5 high-entropy alloy particles (HEAp) were introduced into an Al–Cu–Mg matrix by stir casting. In contrast to previous studies mainly focusing on individual properties of HEAp-reinforced aluminum matrix composites, this work systematically investigates the effects of FeCoCrNiAl0.5Ti0.5 HEAp content on the microstructure, tensile properties, wear behavior, and corrosion performance of cast Al–Cu–Mg composites. The results show that increasing the HEAp content gradually changed the particle distribution from relatively uniform dispersion to agglomeration. Meanwhile, the microhardness increased continuously, whereas the ultimate tensile strength (UTS) first increased and then decreased. The composite with 2 wt.% HEAp exhibited the most uniform particle distribution and achieved the highest UTS of 389 ± 9 MPa, which was 6.4% higher than that of the matrix alloy. This improvement was mainly attributed to thermal mismatch strengthening, load transfer strengthening, and Orowan strengthening. In friction and wear tests, the 2 wt.% HEAp/Al–Cu–Mg composite showed a 13–16% reduction in wear rate and an 8–11% reduction in coefficient of friction (COF) compared with the matrix alloy, mainly because HEAp can bear part of the applied load, provide a lubricating effect, and promote the formation of a mechanically mixed layer (MML). In electrochemical corrosion tests, the composite also exhibited better corrosion resistance than the matrix alloy. Overall, this work provides guidance for the design of HEAp-reinforced Al–Cu–Mg composites for potential applications in wear- and corrosion-related service environments.