Friction stir welds were produced in AA 2524-T351 6.4 mm thick plate using two different welding conditions. The hardness distributions in the two welds were characterized and are rationalized based on supposed process parameter effects on weld time-temperature differences. The transverse tensile properties of the welds are compared to base metal properties over a wide range of applied strain rates. Digital image correlation is used to measure full field surface strains which are reasonably correlated to the weld hardness distributions.
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