Effect of Weld Structure on Fatigue Life of Friction Stir Spot Welding in Magnesium AZ31 Alloy
作者： H. M. Rao , J. B. Jordon
DOI: 10.1007/978-3-319-48203-3_70
关键词: Metallurgy 、 Magnesium 、 Fracture (geology) 、 Welding 、 Magnesium alloy 、 Materials science 、 Fractography 、 AZ31 alloy 、 Spot welding
摘要: In this paper the fatigue behavior in friction stir spot welded coupons of magnesium AZ31 alloy manufactured under different welding conditions are investigated. Two sets lap-shear were based on varying plunge depth and tool geometry. Metallographic analysis untested lap-welds revealed differences microstructural geometrical features. Results from load controlled cyclic tests showed that one set welds exhibited better performance compared to other set. Optical fractography failed cracks initiated at weld interface both coupons. However, fracture mode variability between two As such, main conclusion study is effective top sheet thickness, which largely determined by shoulder depth, plays a significant role alloys.
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