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<p>The welding of two different aluminum alloys has a high demand for different engineering applications. The two different aluminum alloys AA5052-H32 and AA5083-H111 are used to weld with a tungsten arc welding process. The ER5356 filler rod is used to join the two different aluminum alloys. Scandium is used as a reinforcement material along with the ER5356 filler rod with two different weight percentage (0.25 and 0.5 wt.%). The welding experiments are planned with nine different combinations with the following weld input parameters such as current (Amps), voltage (<i>V</i>) and scandium reinforcement (wt.%). The metallurgical quality of the weld samples is evaluated with the help of an optical microscope and scanning electron microscope. From the superficial analysis, the weldments are confirmed with a metallurgical bonding and metallurgical transformation. Mechanical load in axial pull is found to be better with 0.5 wt.% of scandium-reinforced (264&#xa0;MPa) weldments as the bonding strength increased compared to 0.25 wt.% (195&#xa0;MPa) and with no reinforcement (168&#xa0;MPa), respectively. The % elongation is better with 0.5 wt.% scandium-reinforced weldments (11%) than with lower scandium concentrations. Similarly, the impact strength also increases in the 0.5 wt.% of scandium-reinforced samples. While bending, the base metal has high ductility and reinforced material fails to stretch with bending load.</p>

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Evaluation of Mechanical Properties and Performance in Dissimilar Tungsten Inert Gas Welding of Aluminum Alloy Using Variable %wt of Scandium Reinforced Electrode

  • 期刊论文

  • 发表日期：

    2025年9月30日

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  • S. P. Jani,
  • D. Antony Prabu,
  • S. Murugan,
  • A. Saravanan

摘要

The welding of two different aluminum alloys has a high demand for different engineering applications. The two different aluminum alloys AA5052-H32 and AA5083-H111 are used to weld with a tungsten arc welding process. The ER5356 filler rod is used to join the two different aluminum alloys. Scandium is used as a reinforcement material along with the ER5356 filler rod with two different weight percentage (0.25 and 0.5 wt.%). The welding experiments are planned with nine different combinations with the following weld input parameters such as current (Amps), voltage (V) and scandium reinforcement (wt.%). The metallurgical quality of the weld samples is evaluated with the help of an optical microscope and scanning electron microscope. From the superficial analysis, the weldments are confirmed with a metallurgical bonding and metallurgical transformation. Mechanical load in axial pull is found to be better with 0.5 wt.% of scandium-reinforced (264 MPa) weldments as the bonding strength increased compared to 0.25 wt.% (195 MPa) and with no reinforcement (168 MPa), respectively. The % elongation is better with 0.5 wt.% scandium-reinforced weldments (11%) than with lower scandium concentrations. Similarly, the impact strength also increases in the 0.5 wt.% of scandium-reinforced samples. While bending, the base metal has high ductility and reinforced material fails to stretch with bending load.