Base material location dependence of corrosion response in friction-stir-welded dissimilar 2024-to-5083 aluminum alloy joints  

母材位置对2024-5083异种铝合金搅拌摩擦焊接头腐蚀响应行为的影响

作　　者：Peng-liang NIU Wen-ya LI Yu-hua CHEN Qi-peng LIU Dao-lun CHEN 牛鹏亮;李文亚;陈玉华;刘其鹏;陈道伦(南昌航空大学航空制造工程学院轻合金加工技术国防重点学科实验室,南昌330063;西北工业大学凝固技术国家重点实验室陕西省摩擦焊工程技术重点实验室,西安710072;Department of Mechanical and Industrial Engineering,Toronto Metropolitan University,Toronto M5B2K3,Canada)

机构地区：[1]National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology,School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China [2]Shaanxi Key Laboratory of Friction Welding Technologies,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China [3]Department of Mechanical and Industrial Engineering,Toronto Metropolitan University,Toronto M5B2K3,Canada

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第7期2164-2176,共13页中国有色金属学报（英文版）

基　　金：financial supports from the National Natural Science Foundation of China (No.52105357);the Natural Sciences and Engineering Research Council of Canada (NSERC) in the form of international research collaboration,the Natural Science Foundation for Youth of Jiangxi Education Department,China (No.DA202003181);the Foundation of National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology of China (No.EG202103420);the Doctor Starting Foundation of Nanchang Hangkong University,China (No.EA202003208)。

摘　　要：The effects of the base material(BM)location on the mechanical properties and the exfoliation corrosion performance of friction-stir-welded(FSWed)dissimilar 2024-to-5083 aluminum alloy joints were investigated.Scanning electron microscopy(SEM),electron backscatter diffraction(EBSD),transmission electron microscopy(TEM),tensile tests and electrochemical experiments were conducted.The results revealed that the BM location had little effect on the tensile properties of the joints.The grain orientation spread(GOS)value of 2024 alloy side was lower than that of 5083 alloy side.Intergranular corrosion occurred mainly on the 2024 alloy side,while the grain interior of the 5083 alloy side was corroded due to the higher GOS value and dislocation density.The FSWed dissimilar joints with a superior exfoliation corrosion resistance could be achieved when the 5083 aluminum alloy with better corrosion performance was positioned on the retreating side.研究母材放置位置对2024-5083铝合金搅拌摩擦焊接头力学性能和剥落腐蚀性能的影响。采用扫描电子显微镜、电子背散射、透射电子显微镜、拉伸试验和电化学腐蚀试验对接头进行分析。结果表明,母材放置位置对接头的拉伸性能影响较小。2024铝合金侧的晶粒取向分布值低于5083铝合金侧。2024铝合金侧以晶间腐蚀为主,5083铝合金侧以晶粒内部腐蚀为主,这是由于5083铝合金侧的晶粒取向分布值高且位错密度高。当耐腐蚀性好的5083铝合金位于后退侧时,接头具有优良的耐腐蚀性能。

关 键 词：friction stir welding dissimilar aluminum alloys microstructure mechanical properties exfoliation corrosion 

分 类 号：TG453.9[金属学及工艺—焊接] TG172