Journal Published Online: 27 August 2018
Volume 47, Issue 4

Microstructure Evaluation on Friction Stir Welding of Cryorolled 2219 Aluminum Alloy

CODEN: JTEVAB

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, Rengareddy Dt., Telangana, India
Panneerselvam, K.
Department of Production Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu, India
Sathiya, P.
Department of Production Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu, India
Noorul Haq, A.
Department of Production Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu, India
Sundarrajan, S.
National Institute of Technology, Tiruchirappalli, Tamilnadu, India
Mastanaiah, P.
Defence Research and Development Laboratory, Hyderabad, Telengana, India
Srinivasa Murthy, C. V.
Defence Research and Development Laboratory, Hyderabad, Telengana, India
Pages: 20
Price: $25.00
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Stock #: JTE20170429
ISSN: 0090-3973
DOI: 10.1520/JTE20170429