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<p>Ti6Al4V alloy is widely used in aircraft engine blades. However, its poor wear resistance and fatigue performance necessitate surface strengthening treatments. Abrasive water jet peening (AWJP) is an efficient surface enhancement technique that combines the advantages of both shot peening and water jet peening. This study comprehensively investigates the process of abrasive water jet peening on the curved surfaces of Ti6Al4V alloy in terms of surface roughness, hardness, and residual stress. The results indicate that, under the same processing parameters, the surface roughness of the concave surface is significantly higher, while the convex surface exhibits higher hardness and a notable difference in residual stress distribution. At higher pressures, material removal is more likely to occur on the convex surface, leading to the formation of pits in the jet core region. The optimized process results in a 38.5% reduction in roughness, a 12.8% increase in hardness, and a 286.2&#xa0;MPa increase in residual compressive stress for the concave surface. For the convex surface, roughness decreased by 66.8%, hardness increased by 24.3%, and residual compressive stress increased by 314.3&#xa0;MPa. This study provides valuable guidance for the strengthening of Ti6Al4V alloy blades.</p>

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Study on the process of abrasive water jet peening for Ti6Al4V curved surfaces

  • 期刊论文

  • 发表日期：

    2025年5月16日

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  • Yimin Wang,
  • Meiping Wu,
  • Songqi Zhou,
  • Xiaojin Miao

摘要

Ti6Al4V alloy is widely used in aircraft engine blades. However, its poor wear resistance and fatigue performance necessitate surface strengthening treatments. Abrasive water jet peening (AWJP) is an efficient surface enhancement technique that combines the advantages of both shot peening and water jet peening. This study comprehensively investigates the process of abrasive water jet peening on the curved surfaces of Ti6Al4V alloy in terms of surface roughness, hardness, and residual stress. The results indicate that, under the same processing parameters, the surface roughness of the concave surface is significantly higher, while the convex surface exhibits higher hardness and a notable difference in residual stress distribution. At higher pressures, material removal is more likely to occur on the convex surface, leading to the formation of pits in the jet core region. The optimized process results in a 38.5% reduction in roughness, a 12.8% increase in hardness, and a 286.2 MPa increase in residual compressive stress for the concave surface. For the convex surface, roughness decreased by 66.8%, hardness increased by 24.3%, and residual compressive stress increased by 314.3 MPa. This study provides valuable guidance for the strengthening of Ti6Al4V alloy blades.