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<p>In this study, the effects of different parameters of vibration-assisted laser welding at constant frequency, including power, welding speed, and pulse width, were investigated on the microstructure and mechanical properties of dissimilar joints of Inconel 625/AISI 316 stainless steel. It was found that the microstructure of the optimal joints was equiaxed dendrites, where the size of dendrites at a constant power of 470 W with a welding speed of 80&#xa0;mm/s and a pulse width of 5.03&#xa0;ms was smaller than the others. The results showed that, in addition to the hardness (265 HV) and tensile strength (507&#xa0;MPa), the elongation percentage (34%) was also higher in the corresponding conditions. Also, the impact test results showed that the amount of energy absorbed by this sample was the maximum, which was attributed to the fine-grained microstructure of this sample as the most important parameter affecting the impact energy.</p>

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Vibration-Assisted Dissimilar Laser Welding of Inconel 625/AISI 316 Stainless Steel: A Study on Microstructure and Mechanical Properties

  • 期刊论文

  • 发表日期：

    2025年9月25日

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  • Saeid Mokaram Jahromi,
  • Hossein Hosseini Tayeb,
  • Seyed Mahdi Rafiaei

摘要

In this study, the effects of different parameters of vibration-assisted laser welding at constant frequency, including power, welding speed, and pulse width, were investigated on the microstructure and mechanical properties of dissimilar joints of Inconel 625/AISI 316 stainless steel. It was found that the microstructure of the optimal joints was equiaxed dendrites, where the size of dendrites at a constant power of 470 W with a welding speed of 80 mm/s and a pulse width of 5.03 ms was smaller than the others. The results showed that, in addition to the hardness (265 HV) and tensile strength (507 MPa), the elongation percentage (34%) was also higher in the corresponding conditions. Also, the impact test results showed that the amount of energy absorbed by this sample was the maximum, which was attributed to the fine-grained microstructure of this sample as the most important parameter affecting the impact energy.