Abstract:The contributions of multiple strengthening factors to the 0.2% flow stress have been studied in a cast and wrought Ni-Co base disk superalloy with varying grain size, twin fraction and bimodal or trimodal ′ size distributions. The alloy was heat-treated within the ′ sub-and super-solvus temperature ranges between 1100 o C to 1180 o C, followed by two step aging heat-treatment. The contribution of each strengthening factor are analyzed by measuring its Vickers hardness at over a structural scale ranging from… Show more
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