Towards Friction Stir Remanufacturing of High‑Strength Aluminum Components  

作　　者：Xiangchen Meng Yuming Xie Xiaotian Ma Mingyang Liang Xiaoyang Peng Shiwei Han Lei Kan Xin Wang Sihao Chen Yongxian Huang 

机构地区：[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 Ofce of the Army Installment Station in Chongqing,Chongqing 400042,China [4]Shanghai Spacefight Precision Machinery Institute,Shanghai 201600,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2023年第1期91-102,共12页金属学报（英文版）

基　　金：supported by the China Postdoctoral Science Foundation(Nos.2021T140151,2021M690820);the National Natural Science Foundation of China(No.52001099);the Shanghai Aerospace Science and Technology Innovation Fund,China(No.SAST2020-108).

摘　　要：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 afected material fow,which ensured that the materials at the repairing interface were forged to metallurgical bonding.Conical angles determined load transfer besides material fow,which afected 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.

关 键 词：Aluminum alloy Defects Friction stir welding Interfaces MICROSTRUCTURES Mechanical properties 

分 类 号：TG1[金属学及工艺—金属学]