Scholarlink

<p>The present study investigates the microstructural, mechanical, and tribological enhancements achieved in Elektron 21 magnesium alloy through friction stir processing (FSP) reinforced with a novel AlCrCoMoW high-entropy alloy (HEA). A systematic variation of tool rotational speed (1000 to 1400 rpm) was employed to optimize dynamic recrystallization, grain refinement, and reinforcement dispersion. The 1200 rpm processed condition yielded finer equiaxed grains (2.9 <i>µ</i>m) and homogeneous HEA distribution, resulting in a peak hardness of 120 HV and a 55 pct reduction in wear rate compared to the base material. EBSD characterization revealed that the 1200 rpm condition was optimal, achieving complete dynamic recrystallization evidenced by predominant high-angle grain boundaries, uniform finer grain size distribution, and minimal residual strain. Strong metallurgical bonding was indicated by a thin diffusion layer and a clean, well-bonded interface between the HEA particles and the magnesium matrix according to TEM investigation. The coefficient of friction decreased significantly due to uniform particle distribution and formation of a protective tribolayer. Correlations among microstructure, wear resistance, and hardness findings demonstrate that HEA-assisted FSP is an effective route for tailoring surface properties of high-performance, lightweight components in the aerospace and automotive sectors.</p> Graphical Abstract <p></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

Microstructural Refinement and Tribological Enhancement of Elektron 21 Magnesium Alloy via Friction Stir Processing with Al–Cr–Co–Mo–W High-Entropy Alloy Reinforcement

  • 期刊论文

  • 发表日期：

    2026年5月29日

查看全文
  • PRANESH BALAN,
  • R. RAGHU,
  • R. SATHISKUMAR,
  • R. VAIRA VIGNESH

摘要

The present study investigates the microstructural, mechanical, and tribological enhancements achieved in Elektron 21 magnesium alloy through friction stir processing (FSP) reinforced with a novel AlCrCoMoW high-entropy alloy (HEA). A systematic variation of tool rotational speed (1000 to 1400 rpm) was employed to optimize dynamic recrystallization, grain refinement, and reinforcement dispersion. The 1200 rpm processed condition yielded finer equiaxed grains (2.9 µm) and homogeneous HEA distribution, resulting in a peak hardness of 120 HV and a 55 pct reduction in wear rate compared to the base material. EBSD characterization revealed that the 1200 rpm condition was optimal, achieving complete dynamic recrystallization evidenced by predominant high-angle grain boundaries, uniform finer grain size distribution, and minimal residual strain. Strong metallurgical bonding was indicated by a thin diffusion layer and a clean, well-bonded interface between the HEA particles and the magnesium matrix according to TEM investigation. The coefficient of friction decreased significantly due to uniform particle distribution and formation of a protective tribolayer. Correlations among microstructure, wear resistance, and hardness findings demonstrate that HEA-assisted FSP is an effective route for tailoring surface properties of high-performance, lightweight components in the aerospace and automotive sectors.

Graphical Abstract