Abstract

There are many discrepancies in the literature concerning the structure of martensite in titanium alloys with isomorphous {beta}-stabilizing elements and the mechanism of its decomposition on ageing. It has been proposed that the {alpha}{double_prime}-martensite crystal structure results from the isomorphic decomposition of the hexagonal solid solution during the {beta} {yields} {alpha}{double_prime} martensite transformation. Decomposition begins during cooling (due to relatively high M{sub s} temperature) and continues during ageing. To check this hypothesis, the structural changes in the Ti-8 wt.% Mo alloy during ageing have been studied in this work to establish a correlation between the CI parameters and rhombic distortions of the {alpha}{double_prime}-martensite lattice.

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