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- W2357182461 abstract "The fatigue performances of AA6061-T6 friction-stir-welded overlap joints and influences of welds defects were investigated and comparatively analyzed based on the fatigue experiments of single pass and double pass welded specimens. The results indicate that the hook defects always form at the bonded interface of friction stir overlap welded joints and have seriously influence on the fatigue properties of the specimen. The fatigue strength of overlap joints is less than 5. 6% ultimate tensile strength of the base materials. The fatigue properties of single pass welded specimens are better than that of double pass welded specimens. The characteristic values of fatigue strength Δσk( R = 0. 1) for single pass and double pass welded specimens are 17. 45MPa and 13. 91MPa,respectively. The double pass welding methods do not improve the distributive features of hook defects. The fatigue fracture surfaces of single pass lapwelded joints indicate the multiple crack initiations and the fatigue cracks always initiate from the bottom of the upper plate corresponding to the hooking places. The fatigue propagation zones show the transgranular fracture features are mainly characterized by the typical fatigue striations and some secondary cracks. The quantities of fatigue crack initiation positions and secondary cracks for the double pass welded specimens are greater than those of the single pass welded specimens which result in the lower fatigue properties." @default.
- W2357182461 created "2016-06-24" @default.
- W2357182461 creator A5072072038 @default.
- W2357182461 date "2013-01-01" @default.
- W2357182461 modified "2023-09-24" @default.
- W2357182461 title "Weld Defects and Fatigue Properties of Friction Stir Overlap Joints for 6061-T6 Aluminum Alloy" @default.
- W2357182461 hasPublicationYear "2013" @default.
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