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This paper discusses and evaluates the microstructural and mechanical properties of Al6061-Fe joints and Iron SAE 1008 created using the Cold Metal Transfer method of welding, focusing their analysis on shot peening and TiN PVD coating effects. Samples prepared both with and without treatments underwent examination via microstructure tensile testing and hardness measurements. Shot peening has increased mechanical properties by compressive residual stresses, and the TiN coating has decreased intermetallic compounds at the weld interface. These in combination have enhanced tensile strength, bending strength, hardness, porosity decrease, and refined grain structure. TiN and AlN phases ensure strong adhesion between the coating and substrate, hence strengthening the joint. Such research provides an opportunity for improving dissimilar metal welding for aerospace and automotive industries requiring high strength joints.

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Influence of Shot Peening and Thin TiN PVD Coated on Microstructure Characteristics of Al6061and Iron SAE 1008 Dissimilar Joints Using CMT Welding

  • 会议论文

  • 发表日期：

    2026年

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  • R. Ganapathy Srinivasan,
  • A. Thamarai Selvan,
  • C. Rajaravi,
  • M. Selvam

摘要

This paper discusses and evaluates the microstructural and mechanical properties of Al6061-Fe joints and Iron SAE 1008 created using the Cold Metal Transfer method of welding, focusing their analysis on shot peening and TiN PVD coating effects. Samples prepared both with and without treatments underwent examination via microstructure tensile testing and hardness measurements. Shot peening has increased mechanical properties by compressive residual stresses, and the TiN coating has decreased intermetallic compounds at the weld interface. These in combination have enhanced tensile strength, bending strength, hardness, porosity decrease, and refined grain structure. TiN and AlN phases ensure strong adhesion between the coating and substrate, hence strengthening the joint. Such research provides an opportunity for improving dissimilar metal welding for aerospace and automotive industries requiring high strength joints.