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Friction stir welding under ambient cooling conditions, using tool rotation rate of 800rpm and welding speed of 200mm per minute was carried out on 2195 and 2199 Al-Li alloys. Underwater welding was also performed on both the alloys using a pool on the top of workpiece. Post weld heat treatment for various durations was conducted to study the effect of alloy chemistry on aging kinetics in various...
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