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<p>This study investigates the impact of ultrasonic shot peening (USP) treatment on the microstructure and fatigue behavior of Inconel 718 alloy. The results of research show that the USP treatment can increase the fatigue life of Inconel 718 alloy. This is mainly due to the fact that USP treatment not only eliminates mechanical grooves that are prone to the formation of crack sources, but also creates pits with smooth transitions, which effectively slows down stress concentrations. In addition, the generation of residual compressive stress in USP-treated sample makes the crack source transfer from the surface to the interior and effectively inhibits the growth rate of fatigue cracks.</p>

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Influence of Ultrasonic Shot Peening on the Microstructure and Fatigue Behavior of Inconel 718 Alloy

  • 期刊论文

  • 发表日期：

    2025年3月3日

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  • Zongxian Song,
  • Keyong Bian,
  • Weiping Yao,
  • Xiaohui Sun,
  • Wei Fu,
  • Xin Zhou,
  • Jinling Peng,
  • Wenhao Geng

摘要

This study investigates the impact of ultrasonic shot peening (USP) treatment on the microstructure and fatigue behavior of Inconel 718 alloy. The results of research show that the USP treatment can increase the fatigue life of Inconel 718 alloy. This is mainly due to the fact that USP treatment not only eliminates mechanical grooves that are prone to the formation of crack sources, but also creates pits with smooth transitions, which effectively slows down stress concentrations. In addition, the generation of residual compressive stress in USP-treated sample makes the crack source transfer from the surface to the interior and effectively inhibits the growth rate of fatigue cracks.