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<p>The present work investigated the application of laser welding to improve dissimilar aluminium alloy joints based on nine experimental results taken from previous studies. The three main factors such as laser power, welding speed and focus offset were used to examine tensile test and Brinell hardness. Analysis of variance (ANOVA) was adopted to examine the effect of each component on the responses. Multi-response optimization was then carried out using the Composite Desirability Function (CDF). The results showed that laser powerwas the most influential factor for increasing UTS, and focusoffset plays a critical role in enhancing the hardness of the joint. From CDF result, the highest optimum UTS and BHN were obtained at a laser power of 3503&#xa0;W, welding speed of 3.5122&#xa0;mm/s and focus offset of 2&#xa0;mm. At these levels, UTS and BHN were obtained as 388&#xa0;MPa and 185 HV, respectively with a maximised highly desirable value of D = 1.000. This study demonstrates the effectiveness of laser welding optimization through statistical analysis and multi-objective optimization, providing valuable insights for improving the quality and strength of dissimilar aluminium alloy joints.</p>

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Exploring laser welding parameters and their effect on dissimilar aluminium alloys using composite desirability function

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • K. Pravinkumar,
  • S. Govarthan,
  • E. Anbuchezhiyan,
  • J. Ramesh Babu,
  • J. Venkatesh,
  • K. Prabhu,
  • R. Ramaswamy

摘要

The present work investigated the application of laser welding to improve dissimilar aluminium alloy joints based on nine experimental results taken from previous studies. The three main factors such as laser power, welding speed and focus offset were used to examine tensile test and Brinell hardness. Analysis of variance (ANOVA) was adopted to examine the effect of each component on the responses. Multi-response optimization was then carried out using the Composite Desirability Function (CDF). The results showed that laser powerwas the most influential factor for increasing UTS, and focusoffset plays a critical role in enhancing the hardness of the joint. From CDF result, the highest optimum UTS and BHN were obtained at a laser power of 3503 W, welding speed of 3.5122 mm/s and focus offset of 2 mm. At these levels, UTS and BHN were obtained as 388 MPa and 185 HV, respectively with a maximised highly desirable value of D = 1.000. This study demonstrates the effectiveness of laser welding optimization through statistical analysis and multi-objective optimization, providing valuable insights for improving the quality and strength of dissimilar aluminium alloy joints.