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In this research, tensile strength (TS), percentage elongation (EL), and micro-hardness (HV) of a Tungsten Inert Gas and Friction Stir Processing (TIG+FSP) welded connections were investigated. The above three mechanical characteristics of AA2519 and AA6063 welded specimens were predicted using empirical relationships with a 95% level of confidence. The models generated highlight the importance of the tool’s rotating speed and tilt angle. During TIG+FSP welding, the heat input to the joint increases as the traverse speed slows and the tool rotational speed rises. Faster tool rotation, as shown by the confidence interval, increases tensile strength and hardness while decreasing residual stress. With a tool rotational of 1500 rpm, a traversal speed of 40 mm/min, and a tilt angle of 1°, the nugget zone (NZ) of a TIG+FSP weldment had the lowest compressive residual stress (21.1 MPa). Hardness (110 HV) was also good (58 HRC) and tensile strength (270 MPa) was strong. Input processing factors tool rotational speed (A), traverse speed (B), and tilt angle (C) are best set at 1130.62 rpm, 52.49 mm/min, and 0.16350, respectively, leading to optimal values of 221.4 MPa for tensile strength, 24.72% for EL, HV at the NZ, and 91.47 HV for residual stress at the NZ.

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Optimization on the Process Parameters of AA2519 and AA6063 Joints by Friction Stir and Tungsten Inert Gas Process Welding Using Response Surface Methodology

  • 会议论文

  • 发表日期：

    2025年

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  • P. Thangavel,
  • S. Prakasam,
  • K. M. Arunraja,
  • K. Kannakumar

摘要

In this research, tensile strength (TS), percentage elongation (EL), and micro-hardness (HV) of a Tungsten Inert Gas and Friction Stir Processing (TIG+FSP) welded connections were investigated. The above three mechanical characteristics of AA2519 and AA6063 welded specimens were predicted using empirical relationships with a 95% level of confidence. The models generated highlight the importance of the tool’s rotating speed and tilt angle. During TIG+FSP welding, the heat input to the joint increases as the traverse speed slows and the tool rotational speed rises. Faster tool rotation, as shown by the confidence interval, increases tensile strength and hardness while decreasing residual stress. With a tool rotational of 1500 rpm, a traversal speed of 40 mm/min, and a tilt angle of 1°, the nugget zone (NZ) of a TIG+FSP weldment had the lowest compressive residual stress (21.1 MPa). Hardness (110 HV) was also good (58 HRC) and tensile strength (270 MPa) was strong. Input processing factors tool rotational speed (A), traverse speed (B), and tilt angle (C) are best set at 1130.62 rpm, 52.49 mm/min, and 0.16350, respectively, leading to optimal values of 221.4 MPa for tensile strength, 24.72% for EL, HV at the NZ, and 91.47 HV for residual stress at the NZ.