Scholarlink

<p>The response surface methodology using Central Composite Design (CCD) was employed to optimize the multipass friction stir processing (MPFSP) parameters for AZ91D magnesium alloy reinforced with Al₂O₃ and SiC nanoparticles, along with detailed metallurgical characterization. The highest ultimate tensile strength (UTS) of 312.85&#xa0;MPa was achieved with 5 pass FSP, attributed to the uniform dispersion of nanoparticles in the processed zone. These particles acted as obstacles to dislocation motion, significantly enhancing tensile properties through multiple strengthening mechanisms and microstructural refinement. Increasing the number of FSP passes promoted dynamic recrystallization and grain refinement, resulting in equiaxed grains that improved microhardness by restricting dislocation activity. Higher reinforcement concentrations and FSP passes (from 1 to 5) suppressed grain boundary migration and reduced both grain size and high-angle grain boundaries. The optimized processing parameters were identified as a tool rotational speed of 712&#xa0;rpm, welding speed of 51.87&#xa0;mm/min, and an FSP pass value of 3.4. Under these conditions, the optimized output responses were a UTS of 278.58&#xa0;MPa, 17.95% elongation, and a microhardness of 57.33 HV in the processed zone. These results serve as a valuable guideline for enhancing the mechanical performance of AZ91D via MPFSP with Al₂O₃ and SiC reinforcements.</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

Optimization of multipass friction stir processing parameters for AZ91D nanocomposites reinforced with hybrid nanoparticles by response surface methodology

  • 期刊论文

  • 发表日期：

    2025年9月11日

查看全文
  • Vikas Chaudhary,
  • Rajeev Verma,
  • Varun Sharma

摘要

The response surface methodology using Central Composite Design (CCD) was employed to optimize the multipass friction stir processing (MPFSP) parameters for AZ91D magnesium alloy reinforced with Al₂O₃ and SiC nanoparticles, along with detailed metallurgical characterization. The highest ultimate tensile strength (UTS) of 312.85 MPa was achieved with 5 pass FSP, attributed to the uniform dispersion of nanoparticles in the processed zone. These particles acted as obstacles to dislocation motion, significantly enhancing tensile properties through multiple strengthening mechanisms and microstructural refinement. Increasing the number of FSP passes promoted dynamic recrystallization and grain refinement, resulting in equiaxed grains that improved microhardness by restricting dislocation activity. Higher reinforcement concentrations and FSP passes (from 1 to 5) suppressed grain boundary migration and reduced both grain size and high-angle grain boundaries. The optimized processing parameters were identified as a tool rotational speed of 712 rpm, welding speed of 51.87 mm/min, and an FSP pass value of 3.4. Under these conditions, the optimized output responses were a UTS of 278.58 MPa, 17.95% elongation, and a microhardness of 57.33 HV in the processed zone. These results serve as a valuable guideline for enhancing the mechanical performance of AZ91D via MPFSP with Al₂O₃ and SiC reinforcements.

Graphical abstract