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<p>This study explores the application of ultrasonic surface rolling process (USRP) technology to enhance the surface integrity and mechanical properties of TA1 laser welded joints. For the first time, the non-dominated sorting genetic algorithm III (NSGA-III) was applied to optimize the USRP parameters, aiming to reduce surface roughness, enhance hardness, and improve compressive residual stress (CRS). The optimized process parameters (250 N static force, 2500&#xa0;mm/min feeding speed, 0.05&#xa0;mm rolling interval, and 35 rolling passes) led to a significant 7.15% increment in tensile strength, with surface roughness reduced to 0.064&#xa0;μm and CRS reaching 175.9&#xa0;MPa. This work highlights the potential of USRP for addressing the surface quality challenges in titanium welding applications and offers a scalable method for enhancing the material properties of welded parts in the aerospace and automotive industries.</p>

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Enhancing Surface Integrity of TA1 Welded Joints Via NSGA-III Optimized Ultrasonic Rolling

  • 期刊论文

  • 发表日期：

    2025年10月14日

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  • Yi-Xin Liu,
  • Bai-Lin Wu,
  • Yuan Lin,
  • Miao-Sen Yang,
  • Xi-Yang Liu,
  • Yue Kang,
  • Bin-Feng Lu,
  • Zhi-Ya Han,
  • Li-Ping Tong,
  • Zhi-Xi Zhang,
  • Yong Guo

摘要

This study explores the application of ultrasonic surface rolling process (USRP) technology to enhance the surface integrity and mechanical properties of TA1 laser welded joints. For the first time, the non-dominated sorting genetic algorithm III (NSGA-III) was applied to optimize the USRP parameters, aiming to reduce surface roughness, enhance hardness, and improve compressive residual stress (CRS). The optimized process parameters (250 N static force, 2500 mm/min feeding speed, 0.05 mm rolling interval, and 35 rolling passes) led to a significant 7.15% increment in tensile strength, with surface roughness reduced to 0.064 μm and CRS reaching 175.9 MPa. This work highlights the potential of USRP for addressing the surface quality challenges in titanium welding applications and offers a scalable method for enhancing the material properties of welded parts in the aerospace and automotive industries.