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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 3    June 2005

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Rupture locations of friction stir welded joints of AA2017-T351 and AA6061-T6 aluminum alloys
LIU Hui-jie(刘会杰)1, 2, FENG Ji-cai(冯吉才)1, H.Fujii2, M.Maeda2, K.Nogi2

1. State Key Laboratory of Advanced Welding Production Technology, 
Harbin Institute of Technology, Harbin 150001, China; 
2. Joining and Welding Research Institute, Osaka University, Osaka 567-0047, Japan

Abstract:The tensile rupture locations of friction stir welded joints of AA2017-T351 and AA6061-T6 aluminum alloys were examined. The experiments show that the rupture locations of the joints are different for the two aluminum alloys, which are influenced by the welding parameters. When the joints are free of welding defects, the AA2017-T351 joints are ruptured in the weld nugget adjacent to the thermo-mechanically affected zone on the advancing side and the rupture surfaces appear as oval contours of the weld nugget, while the AA6061-T6 joints are ruptured in the heat affected zone on the retreating side and the rupture surfaces are inclined at a certain degree to the bottom surfaces of the joints. When welding defects are present in the joints, the AA2017-T351 joints are ruptured in the weld center, while the AA6061-T6 joints are ruptured on the retreating side near the weld center. The rupture locations of the joints are dependent on the internal structures of the joints and can be explained through them.

 

Key words: friction stir welding; aluminum alloy; tensile test; rupture location; welding parameter

ISSN 1672-7029
CN 43-1423/U

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