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<p>This study examines the effects of low frequency vibration-assisted welding on the strength and structure of mild steel (AISI 1020) joints. In the experimental study, mild steel plates 5&#xa0;mm thick are welded using shielded metal arc welding, which applies mechanical vibrations in the frequency range of 0–100&#xa0;Hz. Key process parameters, including welding current, vibration frequency, and vibration duration, were improved and modified using response surface methodology and Taguchi’s design of experiments to ascertain their effects on tensile strength. Vibration frequency was found to be the most significant factor affecting weld strength among these parameters. The microstructural properties of the welded joint were further assessed using scanning electron microscopy (SEM). The optimal parameters that produced stronger welds and a uniform microstructure were determined to be 80&#xa0;A for the welding current, 100&#xa0;Hz for the vibration frequency, and 100&#xa0;s for the vibration duration. SEM analysis revealed a smaller grain structure in regions where vibrations aided welding, suggesting improved metal bonding. The study shows that low-frequency vibrations can greatly enhance the mechanical performance and microstructural integrity of mild steel welded joints.</p>

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Tensile strength enhancement in vibration assisted butt welding using response surface optimization

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月31日

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  • Rajeev Ranjan,
  • Manoj Kumar,
  • Ashish Goyal

摘要

This study examines the effects of low frequency vibration-assisted welding on the strength and structure of mild steel (AISI 1020) joints. In the experimental study, mild steel plates 5 mm thick are welded using shielded metal arc welding, which applies mechanical vibrations in the frequency range of 0–100 Hz. Key process parameters, including welding current, vibration frequency, and vibration duration, were improved and modified using response surface methodology and Taguchi’s design of experiments to ascertain their effects on tensile strength. Vibration frequency was found to be the most significant factor affecting weld strength among these parameters. The microstructural properties of the welded joint were further assessed using scanning electron microscopy (SEM). The optimal parameters that produced stronger welds and a uniform microstructure were determined to be 80 A for the welding current, 100 Hz for the vibration frequency, and 100 s for the vibration duration. SEM analysis revealed a smaller grain structure in regions where vibrations aided welding, suggesting improved metal bonding. The study shows that low-frequency vibrations can greatly enhance the mechanical performance and microstructural integrity of mild steel welded joints.