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    Volume 47, Issue 4 (July 2019)

    Microstructure Evaluation on Friction Stir Welding of Cryorolled 2219 Aluminum Alloy

    (Received 25 July 2017; accepted 23 January 2018)

    Published Online: 2018

    CODEN: JTEVAB

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    Abstract

    This article presents a study of friction stir welding (FSW) on cryorolled (CR) AA2219 alloy using a hexagonal pin tool with different set of process parameters. Normally, AA2219 alloy is difficult to weld, but it is possible to get a defect-free, sound weldment with a solid-state welding technique (FSW) compared to traditional welding methods. Here, among the 9 weld joints, the weld made on CR AA2219 by the hexagonal pin tool with 1,000 r/min tool rotational speed at 25 mm/min welding speed and 3° axis inclination exhibited better tensile strength, impact toughness, hardness, and corrosion resistance. It was confirmed by microscopy analysis that the ultrafine grains structure and dissolution of Al2Cu were present at the weld zone. The fine dimple morphology was found at the fracture surface area of weldment. Also, the X-ray Diffraction (XRD) and energy-dispersive X-ray results showed that the intensity of Al2Cu was decreased at the weld portion for the CR AA2219. Dissolution of precipitates resisted the flow of electrons and delivered good resistance against corrosion. Corroded portion surface topography was analyzed, and pit details were measured.

    Author Information:

    Kamal Babu, K.
    Department of Mechanical Engineering, Malla Reddy Engineering College, SecunderabadRengareddy Dt., Telangana

    Panneerselvam, K.
    Department of Production Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu

    Sathiya, P.
    Department of Production Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu

    Noorul Haq, A.
    Department of Production Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu

    Sundarrajan, S.
    National Institute of Technology, Tiruchirappalli, Tamilnadu

    Mastanaiah, P.
    Defence Research and Development Laboratory, Hyderabad, Telengana

    Srinivasa Murthy, C. V.
    Defence Research and Development Laboratory, Hyderabad, Telengana


    Stock #: JTE20170429

    ISSN:0090-3973

    DOI: 10.1520/JTE20170429

    Author
    Title Microstructure Evaluation on Friction Stir Welding of Cryorolled 2219 Aluminum Alloy
    Symposium ,
    Committee A01