Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11007148 | Journal of Manufacturing Processes | 2018 | 10 Pages |
Abstract
Mechanical behavior of double-sided friction stir welding (DS-FSW) aluminum alloy thick plate joints under various rotational rates and welding speeds tested at different strain rates were investigated. The results show that both the yield stress (YS) and the elongation to failure of DS-FSW joints increase, but the ultimate tensile strength (UTS) of defect-free joints decrease with the decrease of strain rate from 10â2 sâ1 to 10â5 sâ1. A remarkable reduction in the YS, UTS and elongation to failure presents, particularly at the top slice of 950/60 joint, reaching approximately 65%, 68% and 25% of the BM tested at a strain rate of 10â4 sâ1and fails through brittle fracture. The top slice presents the highest strength and the middle slice has the largest ductility, the same as change laws of joint efficiency and strain hardening behavior among three slices. The best welding parameters is the rotational rate of 300ârpm and welding speed of 60âmm/min due to the higher and the smaller fluctuation of strength and ductility for different slices.
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Physical Sciences and Engineering
Engineering
Industrial and Manufacturing Engineering
Authors
Weifeng Xu, Huan Wang, Yuxuan Luo, Wenjun Li, M.W. Fu,