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Content available Ultrasonic Assisted Active-Passive Filling Friction Stir Repairing to Eliminate Volume Defects
Wang Tao, Gong Xue, Ji Shude, Xue Gang, Lv Zan
Archives of Metallurgy and Materials
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2021
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Vol. 66, iss. 1
217--222
EN
Ultrasonic assisted active-passive filling friction stir repairing (A-PFFSR) was proposed to repair volume defects in the metallic parts. Sound joints without interfacial defects could be achieved. Firstly, the ultrasonic was beneficial to improving material flow and atom diffusion, and then eliminated kissing bond defects compared to conventional A-PFFSR joints. Secondly, the equiaxed grains were refined by ultrasonic vibration. Lastly, the repairing passes were reduced due to the ultrasonic, which decreased softening degree of the repaired joints. The maximum tensile strength of 150 MPa was achieved. Therefore, this strategy to repair the volume defects is feasibility and potential in the remanufacturing fields of aerospace and transportation.
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