Towards Friction Stir Remanufacturing of High-Strength Aluminum Components |
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Authors: | Xiangchen Meng Yuming Xie Xiaotian Ma Mingyang Liang Xiaoyang Peng Shiwei Han Lei Kan Xin Wang Sihao Chen Yongxian Huang |
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Affiliation: | 1.State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2.Chongqing Tiema Industries Group Co., Ltd., Chongqing 630050, China;3.The Sixth Military Representative Office of the Army Installment Station in Chongqing, Chongqing 400042, China;4.Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China |
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Abstract: | Volumetric defects in high-strength aluminum alloy components were repaired via friction stir remanufacturing (FSR). Various consumable pins made of AA7075-T6 were designed. Top diameters of the consumable pins affected material flow, which ensured that the materials at the repairing interface were forged to metallurgical bonding. Conical angles determined load transfer besides material flow, which affected the fracture of the pins before the dwelling stage. Sound repaired components were achieved when the conical angle of the consumable pin was 1° larger than that of the volumetric defect. The ultimate tensile strength and elongation of the repaired components reached 445.9 MPa and 9.6%, respectively. The design criteria of the consumable pin in the FSR was established, which provided valuable references to repair volumetric defects in high-strength aluminum components. |
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Keywords: | Aluminum alloy:Defects Friction stir welding Interfaces Microstructures Mechanical properties |
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