Influence of tool plunge depth and welding distance on friction stir lap welding of AA5454-O aluminum alloy plates with different thicknesses

作     者：Jun-Won KWON Myoung-Soo KANG Sung-Ook YOON Yong-Jai KWON Sung-Tae HONG Dae-Il KIM Kwang-Hak LEE Jong-Dock SEO Jin-Soo MOON Kyung-Sik HAN 

作者机构：School of Materials Science and EngineeringUniversity of Ulsan School of Mechanical EngineeringUniversity of Ulsan Technical Research LaboratoriesShin Young Co.Ltd. Automotive Parts Innovation CenterUlsan Technopark 

出 版 物：《中国有色金属学会会刊：英文版》 (中国有色金属学报(英文版))

年 卷 期：2012年第22卷第S3期

页      面：624-628页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0813[工学-建筑学] 0703[理学-化学] 0814[工学-土木工程] 080201[工学-机械制造及其自动化] 0702[理学-物理学] 

基　　金：financially supported by the Ministry of Education,Science Technology(MEST)and National Research Foundation of Korea(NRF)through the Human Resource Training Project for Regional Innovation by the development program of local science park funded by the ULSAN Metropolitan City and the MEST(Ministry of Education,Science and Technology) 

主　　题：friction stir lap welding AA5450-O aluminum alloy tool plunge depth welding distance mechanical properties 

摘      要：AA5454-O aluminum alloy plates with thicknesses of 1.4 and 1.0 mm were friction-stir-lap-welded (FSLWed).The influences of the tool plunge depth and welding distance on surface appearance,macrostructure and mechanical properties of the FSLWed plates were experimentally investigated.The tensile shear load of the FSLWed plates was compared with that of the adhesive-bonded plates.Defect-free FSLWed zones were successfully obtained in all the tool plunge depths and the welding distances.The FSLWed zones exhibited the relatively smooth surface morphologies.Under all the FSLWed conditions,the FSLWed zone exhibited higher average hardness than the base metal.In addition,the upper plate exhibited a higher average hardness than the lower plate,although there was no special tendency in spite of the change in the tool plunge depth and the welding distance.The maximum tensile shear load of the FSLWed plates was much higher than that of the adhesive-bonded aluminum alloy plate.Especially,under the FSLW condition of the plunge depth of 1.8 mm and the welding distance of 40 mm,the tensile shear load of the FSLWed plate reached a level about 41% greater than that of the adhesive-bonded aluminum alloy plate.In addition,the maximum tensile shear load of the FSLWed plate was increased with the increase of the welding distance.