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<p>The paper investigates the artificial aging effect on the tensile behaviour of friction stir welding of the aluminum 2219-T87 material, focusing on the impact of different thermal cycles and soaking times. It is shown that artificial aging enhances the ultimate tensile strength (UTS) and yield strength (YS). Aging at 165 °C for 12 h increases the YS by 14.2% due to precipitation hardening. However, aging at 175 °C for 12 h reduces both the UTS and YS due to an excessive precipitation. Ductility decreases with the precipitation hardening, but aging at 165 °C for 12 h retains 9% elongation. In contrast, aging at 175 °C for the same period reduces elongation to 7.4%. Prolonged aging at 165 °C for 18 h further reduces the material ductility.</p>

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Influence of varying thermal cycle of post weld heat treatment on tensile characteristics of friction stir welded joints

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Atif Shazad,
  • Muhammad Uzair,
  • Maaz Akhtar,
  • Abdul Shakoor

摘要

The paper investigates the artificial aging effect on the tensile behaviour of friction stir welding of the aluminum 2219-T87 material, focusing on the impact of different thermal cycles and soaking times. It is shown that artificial aging enhances the ultimate tensile strength (UTS) and yield strength (YS). Aging at 165 °C for 12 h increases the YS by 14.2% due to precipitation hardening. However, aging at 175 °C for 12 h reduces both the UTS and YS due to an excessive precipitation. Ductility decreases with the precipitation hardening, but aging at 165 °C for 12 h retains 9% elongation. In contrast, aging at 175 °C for the same period reduces elongation to 7.4%. Prolonged aging at 165 °C for 18 h further reduces the material ductility.