Impurities block the alpha to omega martensitic transformation in titanium

R. G. Hennig; D. R. Trinkle; J. Bouchet; S. G. Srinivasan; R. C. Albers; J. W. Wilkins

doi:10.1038/nmat1292

Impurities block the alpha to omega martensitic transformation in titanium

Materials Science 2014-04-23 v1

Authors: R. G. Hennig , D. R. Trinkle , J. Bouchet , S. G. Srinivasan , R. C. Albers , J. W. Wilkins

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Abstract

The onset and kinetics of martensitic transformations are controlled by impurities trapped during the transformation. For the alpha to omega transformation in Ti, ab initio methods yield the changes in both the relative stability of and energy barrier between the phases. Using the recently discovered transformation pathway, we study interstitial O, N, C; substitutional Al and V; and Ti interstitials and vacancies. The resulting microscopic picture explains the observations, specifically the suppression of the transformation in A-70 and Ti-6Al-4V titanium alloys.

Keywords

martensitic transformation titanium alloys impurities ab initio alpha to omega transformation

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@article{arxiv.cond-mat/0309162,
  title  = {Impurities block the alpha to omega martensitic transformation in titanium},
  author = {R. G. Hennig and D. R. Trinkle and J. Bouchet and S. G. Srinivasan and R. C. Albers and J. W. Wilkins},
  journal= {arXiv preprint arXiv:cond-mat/0309162},
  year   = {2014}
}

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4 pages, 2 figures, 2 tables

Impurities block the alpha to omega martensitic transformation in titanium

Abstract

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