Novel mixed-mode phase transition involving a composition-dependent displacive component

S. Nag, A. Devaraj, R. Srinivasan, R. E.A. Williams, N. Gupta, G. B. Viswanathan, J. S. Tiley, S. Banerjee, S. G. Srinivasan, H. L. Fraser, R. Banerjee

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Abstract

Solid-solid displacive, structural phase transformations typically undergo a discrete structural change from a parent to a product phase. Coupling electron microscopy, three-dimensional atom probe, and first-principles computations, we present the first direct evidence of a novel mechanism for a coupled diffusional-displacive transformation in titanium-molybdenum alloys wherein the displacive component in the product phase changes continuously with changing composition. These results have implications for other transformations and cannot be explained by conventional theories.

Original languageEnglish
Article number245701
JournalPhysical Review Letters
Volume106
Issue number24
DOIs
Publication statusPublished - 17 Jun 2011
Externally publishedYes

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