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<p>Warm shot peening (WSP) and annealing treatments were conducted on an extruded Ti-45Al-2V-1Cr alloy to create a gradient microstructure with fine grains on the surface. The results indicated that WSP enhanced surface hardness and induced residual compressive stress, thereby improving the material’s wear resistance. The WSP + annealing treatment produced a gradient microstructure, which reduced stress-strain between grains but decreased surface hardness. The annealing process generated a strong texture on the surface, which enhanced the wear properties of the material. The gradient microstructure facilitated the formation of a glazed-oxide layer, which, at high temperatures, was larger than that formed under original sample conditions. This reduced the contact area between the material, resulted in smaller wear scars, and enhanced the wear resistance.</p> Graphical Abstract <p></p>

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Microstructure and tribological properties of an extruded Ti-45 Al-2 V-1 Cr alloy after warm shot peening and annealing treatment

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • Yuhang Wang,
  • Daosheng Wen,
  • Beibei Kong,
  • Zhen Gong,
  • Yanxing Ding,
  • Hechao Lai,
  • Yanzhong Xu,
  • Jintao Niu,
  • Zhen Xiao,
  • Shouren Wang

摘要

Warm shot peening (WSP) and annealing treatments were conducted on an extruded Ti-45Al-2V-1Cr alloy to create a gradient microstructure with fine grains on the surface. The results indicated that WSP enhanced surface hardness and induced residual compressive stress, thereby improving the material’s wear resistance. The WSP + annealing treatment produced a gradient microstructure, which reduced stress-strain between grains but decreased surface hardness. The annealing process generated a strong texture on the surface, which enhanced the wear properties of the material. The gradient microstructure facilitated the formation of a glazed-oxide layer, which, at high temperatures, was larger than that formed under original sample conditions. This reduced the contact area between the material, resulted in smaller wear scars, and enhanced the wear resistance.

Graphical Abstract