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Effect of Tool Pin Profile on Grain Refinement, Microstructure, and Mechanical Properties of AA2219-T62/Incoloy 800 Joints Developed via Friction Stir Welding Process

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Abstract

The present study examined the effect of tool pin profile on the microstructure and mechanical properties of AA2219-T62/Incoloy 800 joints produced using FSW at a fixed rotational speed of 500 rpm. The developed weld joints were studied for microstructure using an optical microscope, electron backscattered diffraction, a scanning electron microscope, X-ray diffraction, and transmission electron microscope. The microstructural results revealed significant grain refinement in the weld zone, X-ray diffraction, and transmission electron microscope results revealed the presence of the Fe3Al phase. Weld joints produced with a tungsten carbide tool with a cylindrical (10°) taper have a maximum hardness of 130 HV and a tensile strength of 320 MPa. Weld joints produced with other tool profiles resulted in lower tensile strength owing to the presence of defects similar to voids, surface tunnels, excessive flash, and end hole defects formed at the interface of AA2219-T62/Incoloy 800 joints.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Jansons Institute of Technology, Coimbatore, Tamil Nadu, India

    M. Magesh

  2. Department of Mechanical Engineering, Coimbatore Institute of Technology, Coimbatore, Tamil Nadu, India

    R. Sathiskumar

  3. Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore, India

    T. Satish Kumar

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  1. M. Magesh
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  2. R. Sathiskumar
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Magesh, M., Sathiskumar, R. & Kumar, T.S. Effect of Tool Pin Profile on Grain Refinement, Microstructure, and Mechanical Properties of AA2219-T62/Incoloy 800 Joints Developed via Friction Stir Welding Process. Trans Indian Inst Met 77, 737–746 (2024). https://doi.org/10.1007/s12666-023-03154-2

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