Microstructure and Fracturing Behavior of AA7075–T651 Aluminum Alloy Cooled During Friction Stir Welding


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Friction-stir-welded joints of 16-mm-thick plates of AA7075 aluminum alloy have been studied. The macrostructure of the weld region over the thickness of the plates and microstructures of various regions of the welded joint were determined using optical and transmission electron microscopes. Tensile testing of the welded samples was conducted, and the average values of the ultimate strength and yield point, as well as relative elongation were calculated. The Vickers hardness profiles in the middle of the cross-section of the welded joint were measured. Friction stir welding with forced cooling (by a compressed air flow or water immersion) was tested to reduce heat damage and improve mechanical properties. The efficiency of such welding has been demonstrated.

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T. Rao

Department of Mechanical Engineering, KKR and KSR Institute of Technology and Sciences

编辑信件的主要联系方式.
Email: srinutadivaka@yahoo.com
印度, Guntur, Andhra Pradesh, 522 017

S. Rao

Department of Mechanical Engineering, SSN College Engineering

Email: srinutadivaka@yahoo.com
印度, Kalavakkam, Tamil Nadu, 603 110

G. Reddy

Metal Joining Group, Defense Metallurgical Research Laboratory

Email: srinutadivaka@yahoo.com
印度, Hyderabad, Telangana, 500 058

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