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<p>This study explores the metallurgical effects of post-processing Mg-(x)Gd-(x)Y alloys (x = 2 and 4 wt.%) through Friction Stir Processing (FSP) on their mechanical performance. Gd-Y alloying led to a reduction in grain size in as cast state. Optimized FSP parameters were employed to study changes in microstructure, mechanical performance, and fracture behavior. Post-FSP, tensile tests showed notable improvements in yield strength, ultimate tensile strength, and ductility compared to the as-cast condition. Multi-pass FSP induced severe plastic deformation and dynamic recrystallization, enabling uniform Gd and Y phase redistribution, grain refinement, and enhanced mechanical performance.</p>

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Microstructural Engineering of As-Cast Mg-Gd-Y Alloys Through Friction Stir Processing Towards Improved Mechanical Performance

  • 期刊论文

  • 发表日期：

    2025年8月13日

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  • Md Saad Patel,
  • Ariful Rahaman,
  • R. Jose Immanuel

摘要

This study explores the metallurgical effects of post-processing Mg-(x)Gd-(x)Y alloys (x = 2 and 4 wt.%) through Friction Stir Processing (FSP) on their mechanical performance. Gd-Y alloying led to a reduction in grain size in as cast state. Optimized FSP parameters were employed to study changes in microstructure, mechanical performance, and fracture behavior. Post-FSP, tensile tests showed notable improvements in yield strength, ultimate tensile strength, and ductility compared to the as-cast condition. Multi-pass FSP induced severe plastic deformation and dynamic recrystallization, enabling uniform Gd and Y phase redistribution, grain refinement, and enhanced mechanical performance.