Microstructure,mechanical properties and stress corrosion behavior of friction stir welded joint of Al-Mg-Si alloy extrusion

作     者：Sen Lin Yun-Lai Deng Hua-Qiang Lin Ling-Ying Ye Zhen Zhang Hua Ji Xin-Ming Zhang Sen Lin;Yun-Lai Deng;Hua-Qiang Lin;Ling-Ying Ye;Zhen Zhang;Hua Ji;Xin-Ming Zhang

作者机构：School of Materials Science and EngineeringCentral South UniversityChangsha410083China Light Alloy Research InstituteCentral South UniversityChangsha410083China Guangxi Liuzhou Yinhai Aluminum Co.LtdLiuzhou545006China National Engineering Research Center for High-Speed EMUCRRC Qingdao Sifang Co.LtdQingdao266000China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第6期

页      面：2057-2067页

核心收录：

学科分类：080503[工学-材料加工工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the Scientific Research and Technology Development Program of Guangxi (No.AA16380036) the National Key Research and Development Program of China (Nos.2016YFB0300901 and 2017YFB0306301) the National Natural Science Foundation of China (Nos.51375503 and 51705539) the BaGui Scholars Program of China's Guangxi Zhuang Autonomous Region (No.2013A017) 

主　　题：EBSD Slow strain rate test Stress corrosion cracking Al-Mg-Si alloy Friction stir welding 

摘      要：Microstructure,mechanical properties and stress corrosion behavior of friction stir welded(FSWed) AlMg-Si alloy were *** average grain sizes of shoulder-affected zone(SAZ),nugget zone(NZ),heat-affected zone(HAZ) and base material(BM) are 6.03,4.80,168.30 and 127.24 μm,*** thermo-mechanically affected zone(TMAZ),which is generated on the edge position between HAZ and weld nugget zone,has a narrow width of 400 μ*** ultimate tensile strength(UTS) of FSWed joint is 232.20 MPa,about 91.04% with respect to that of base material of 255.06 MPa,and the joint fracture occurs at HAZ on advancing side(AS).The FSWed joint is more susceptive to stress corrosion cracking(SCC) than base material,and the SCC susceptibility increases with the rise in *** residual UTS of FSWed joints in constant loaded tests at the load levels of90,105 and 120 MPa is 89.97%,67.50% and 54.75% of the UST of FSWed joint in air,*** increase of the load in constant loaded tests and four-point beambent tests accelerates the SCC of FSWed joints.