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<p>Abrasive water jet peening (AWJP) is an advanced and efficient surface strengthening technique for metallic materials. In this study, the surface roughness, hardness, and residual stress of Ti6Al4V titanium alloy were analyzed to determine the optimal full-coverage strengthening strategy for continuous curved surfaces. The results indicate that different tool entry positions significantly affect the strengthening performance. Among the tested paths, the transverse feed trajectory exhibited superior enhancement compared with the two longitudinal paths. At a 40% overlap ratio, the difference in residual compressive stress between the overlapped and non-overlapped regions of the transverse trajectory was only 4.74%. The non-overlapped region achieved 96.93% and 92.56% of the hardness and residual stress improvements obtained at a 60% overlap ratio, respectively. Under processing parameters of 40&#xa0;mm/100&#xa0;MPa, the effective strengthening boundary of the Ti6Al4V continuous curved surface was determined to be 3.1&#xa0;mm, while the optimal strengthening boundary was identified as 0.62&#xa0;mm.</p>

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Optimization of abrasive water jet peening process for continuous curved surfaces of Ti6Al4V alloy

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • Yimin Wang,
  • Meiping Wu,
  • Xiaojin Miao,
  • Xiaoshuo Gong,
  • Jinyan Wang

摘要

Abrasive water jet peening (AWJP) is an advanced and efficient surface strengthening technique for metallic materials. In this study, the surface roughness, hardness, and residual stress of Ti6Al4V titanium alloy were analyzed to determine the optimal full-coverage strengthening strategy for continuous curved surfaces. The results indicate that different tool entry positions significantly affect the strengthening performance. Among the tested paths, the transverse feed trajectory exhibited superior enhancement compared with the two longitudinal paths. At a 40% overlap ratio, the difference in residual compressive stress between the overlapped and non-overlapped regions of the transverse trajectory was only 4.74%. The non-overlapped region achieved 96.93% and 92.56% of the hardness and residual stress improvements obtained at a 60% overlap ratio, respectively. Under processing parameters of 40 mm/100 MPa, the effective strengthening boundary of the Ti6Al4V continuous curved surface was determined to be 3.1 mm, while the optimal strengthening boundary was identified as 0.62 mm.