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Method of using friction stir welding to repair weld defects and to help avoid weld defects in intersecting welds
Method of using friction stir welding to repair weld defects and to help avoid weld defects in intersecting welds
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机译:使用摩擦搅拌焊来修复焊接缺陷并帮助避免相交焊缝中出现焊接缺陷的方法
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摘要
A method of using friction stir welding to repair weld defects and to help avoid weld defects in intersecting welds and crack-sensitive material, such as 2195 Al—Cu—Li. Intersecting fusion welds in 2195 Al—Cu—Li have shown a propensity to crack both during welding and during proof testing. These cracks have generally been associated with a particular metallurgical structure present in the fusion zone ofVPPA/SPA weldments. HYBRID Friction Stir Overwelding of the initial VPPA/SPA weld from the penetration side is shown to convert the cast microstructure of these VPPA/SPA weldments into a fine grained, dynamically recrystallized microstructure showing higher strength, ductility, toughness, and resistance to intersection weld cracking.
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