Journal of Changshu Institute of Technology2025，Vol.39Issue(2)：115-119,5.
异种铝合金搅拌摩擦焊接头微观组织与力学性能研究
Microstructure and Mechanical Properties of Friction Stir Welded Dissimilar Aluminum Alloys
摘要
Abstract
In order to obtain the relationship between microstructure and mechanical properties of 7050/7075 dissimilar aluminum alloys at different rotated speeds,five groups of rotated speeds were set for welding experiments in this study.The rotated speeds of the welding tool were 1 000 r/min,1 200 r/min,1 400 r/min,1 600 r/min,1 800 r/min.The microstructure of the weld cross-section and metallographic structure after the tensile experiment were compared.The results show that the speedier the increase of the rotation is,the finer the grains in the weld nugget zone are,and the more uniform the distribution of refined grains is after recrystallization.The joints at 1 400 r/min and 1 800 r/min have better tensile properties.The joint remains defect-free at 1 400 r/min,which is the best welding process parameter in this experiment.The microstructure of nugget zone and base metal was comparatively analyzed through EBSD experiments,and the dynamic recrystallization theory of nugget zone was preliminarily verified.关键词
异种铝合金/搅拌摩擦焊/转速/微观组织/力学性能Key words
dissimilar aluminum alloy/friction stir welding/rotated speed/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
姚刘超,吴俊杰,谈茁宇,欧文敏,郭国林,邹琳,田露苗..异种铝合金搅拌摩擦焊接头微观组织与力学性能研究[J].Journal of Changshu Institute of Technology,2025,39(2):115-119,5.基金项目
常熟理工学院大学生创新创业训练计划项目"异种铝合金搅拌摩擦焊接头微观组织与力学性能关系"(XJDC2023063) （XJDC2023063）
