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<p>Extremely needed in the aerospace and automobile industries, micro voids and pores weakening the fusion zone of Aluminium Magnesium alloy by TIG joint were found with base filler ER5356. To compose defect free TIG welded joints, scandium influenced base filler ER5356 composites was utilized to resolve these defects. The current (A), gas flow proportions (L/min) and scandium content of the base filler rod ER5356 containing 0, 0.25 and 0.50 wt% of scandium were approached by Taguchi L9 technique. The characterization, tensile strength, microhardness and fractography of all the TIG welded joints produced were investigated. To optimize the TIG welding process parameters was used with identified mechanical properties such as tensile strength and microhardness. Out of different welding runs, the welding runs (W7) made with following process parameters: a current of 190&#xa0;A, a gas flow proportions of 10&#xa0;L/min and base filler + 0.50% Scandium exhibited the mechanical properties (267.49&#xa0;MPa and 121.64 Hv)higher than 0.25 wt% scandium added base filler and base filler ER5356, which exhibited grain refinement in the weldment. SEM examinations revealed that secondary phase particles were produced by the addition of scandium. Fractography revealed that the optimized samples exhibited a ductile nature in fractured area.</p>

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Optimization of TIG welding process parameters for Al-Mg alloy with ER5356 and scandium composites filler by grey analysis

  • 期刊论文

  • 发表日期：

    2025年1月10日

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  • R. Ashok Raj,
  • C. Chanakyan,
  • D. Antony Prabu,
  • S. Prabagaran

摘要

Extremely needed in the aerospace and automobile industries, micro voids and pores weakening the fusion zone of Aluminium Magnesium alloy by TIG joint were found with base filler ER5356. To compose defect free TIG welded joints, scandium influenced base filler ER5356 composites was utilized to resolve these defects. The current (A), gas flow proportions (L/min) and scandium content of the base filler rod ER5356 containing 0, 0.25 and 0.50 wt% of scandium were approached by Taguchi L9 technique. The characterization, tensile strength, microhardness and fractography of all the TIG welded joints produced were investigated. To optimize the TIG welding process parameters was used with identified mechanical properties such as tensile strength and microhardness. Out of different welding runs, the welding runs (W7) made with following process parameters: a current of 190 A, a gas flow proportions of 10 L/min and base filler + 0.50% Scandium exhibited the mechanical properties (267.49 MPa and 121.64 Hv)higher than 0.25 wt% scandium added base filler and base filler ER5356, which exhibited grain refinement in the weldment. SEM examinations revealed that secondary phase particles were produced by the addition of scandium. Fractography revealed that the optimized samples exhibited a ductile nature in fractured area.