Scholarlink

<p>The Al-Cu-Mg aluminum alloy is known for its excellent mechanical properties, making it suitable for various engineering applications. However, its strength tends to decrease during the welding process. To address this issue, solid-state friction stir welding is commonly used for joining this alloy. To further improve joint properties, in this experiment, different cooling environments, i.e., natural air, water, and liquid nitrogen, were employed during welding. Additionally, post-weld heat treatment was applied to enhance the joint performance. The results revealed that water cooling produced the highest tensile strength among all cooling methods. Further post-weld aging improved the mechanical properties under all conditions, with the highest strength achieved after 24 hours aging with lowest fatigue crack growth rate in the water-cooled samples. The liquid nitrogen cooling significantly increased fatigue crack propagation, likely due to the formation of micro-cracks.</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

Influence of Cooling and Post-weld Aging on Mechanical and Fatigue Properties of Friction Stir Welded Al-Cu-Mg Alloy

  • 期刊论文

  • 发表日期：

    2025年9月26日

查看全文
  • Ratnesh Kumar Raj Singh,
  • Sachin Rathore,
  • Mandeep Kumar

摘要

The Al-Cu-Mg aluminum alloy is known for its excellent mechanical properties, making it suitable for various engineering applications. However, its strength tends to decrease during the welding process. To address this issue, solid-state friction stir welding is commonly used for joining this alloy. To further improve joint properties, in this experiment, different cooling environments, i.e., natural air, water, and liquid nitrogen, were employed during welding. Additionally, post-weld heat treatment was applied to enhance the joint performance. The results revealed that water cooling produced the highest tensile strength among all cooling methods. Further post-weld aging improved the mechanical properties under all conditions, with the highest strength achieved after 24 hours aging with lowest fatigue crack growth rate in the water-cooled samples. The liquid nitrogen cooling significantly increased fatigue crack propagation, likely due to the formation of micro-cracks.