Scholarlink

<p>Underwater Friction Stir Welding has arisen as proficient solid-state joining method for aluminium alloys necessitating stringent heat regulation. This work experimentally tested and systematically optimized the mechanical performance of 5&#xa0;mm thick AA5754 butt joints produced by Underwater Friction Stir Welding. The influence of tool rotational speed, axial force and welding speed, on microhardness and tensile strength was assessed by an experimental design based on Taguchi orthogonal array. ANOVA were utilized to assess significance and impact of each process parameter. A multi-criteria decision-making (MCDM) MEREC and CoCoSo approaches was employed to determine best parameter combination, thereby addressing constraints of traditional single-response optimization. The findings indicate that tool rotational speed is the predominant contributor, succeeded by axial force and welding speed. Ideal process parameters for enhanced ki was determined at a a tool rotation speed of 1100&#xa0;rpm, an axial force of 6 kN, and welding speed of 20&#xa0;mm/min, corresponding to (X2 Y2 Z2). The enhanced UFSW condition led to a significant enhancement in joint efficiency and tensile strength, achieving approximately 90% of the base metal strength, accompanied by a refined nugget-zone microstructure and less softening at heat-affected zone. The strong correlation among anticipated and experimental outcomes validates the reliability of the suggested optimization approach. This study illustrates that the amalgamation of UFSW with sophisticated MCDM-based optimization offers a dependable method for fabricating high-quality AA5754 weld joints for maritime and structural uses.</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 mechanical performance of underwater friction stir welded AA5754 aluminum alloy using MEREC–CoCoSo approach

  • 期刊论文

  • 发表日期：

    2026年5月7日

查看全文
  • Ganesh Babu L.,
  • Asha G. R.,
  • Gomathi M.,
  • Venkata Veeranjaneyulu I.,
  • Vetrivel K. P.,
  • Vinod Kumar D.

摘要

Underwater Friction Stir Welding has arisen as proficient solid-state joining method for aluminium alloys necessitating stringent heat regulation. This work experimentally tested and systematically optimized the mechanical performance of 5 mm thick AA5754 butt joints produced by Underwater Friction Stir Welding. The influence of tool rotational speed, axial force and welding speed, on microhardness and tensile strength was assessed by an experimental design based on Taguchi orthogonal array. ANOVA were utilized to assess significance and impact of each process parameter. A multi-criteria decision-making (MCDM) MEREC and CoCoSo approaches was employed to determine best parameter combination, thereby addressing constraints of traditional single-response optimization. The findings indicate that tool rotational speed is the predominant contributor, succeeded by axial force and welding speed. Ideal process parameters for enhanced ki was determined at a a tool rotation speed of 1100 rpm, an axial force of 6 kN, and welding speed of 20 mm/min, corresponding to (X2 Y2 Z2). The enhanced UFSW condition led to a significant enhancement in joint efficiency and tensile strength, achieving approximately 90% of the base metal strength, accompanied by a refined nugget-zone microstructure and less softening at heat-affected zone. The strong correlation among anticipated and experimental outcomes validates the reliability of the suggested optimization approach. This study illustrates that the amalgamation of UFSW with sophisticated MCDM-based optimization offers a dependable method for fabricating high-quality AA5754 weld joints for maritime and structural uses.