Effects of scandium on microstructure and mechanical properties of RR1000

Add time:07/30/2019    Source:sciencedirect.com

In this work, effects of scandium on microstructure and mechanical properties of RR1000 were studied. The addition of scandium effectively refines the grain and modifies the morphology of primary γʹ at grain boundary. In the meantime, Sc doping starkly affects the evolution behavior of γʹ during aging, resulting in an inhomogeneous precipitate distribution. Moreover, scandium has a good affinity to oxygen, which consumes deleterious element in the matrix, leading to a stronger grain boundary. As the results, both strength and elongation at room temperature increase gradually with increasing Sc content in the range of 0–0.098 wt % addition.

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