Influence of Sn on martensitic beta Ti alloys

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • S. Cai
  • L. Wang
  • J. E. Schaffer
  • J. Gao
  • Y. Ren

Detail(s)

Original languageEnglish
Pages (from-to)764-772
Journal / PublicationMaterials Science and Engineering A
Volume743
Publication statusPublished - 16 Jan 2019
Externally publishedYes

Abstract

The influence of Sn composition in Ti-17 at% Nb alloys is studied by cyclic tension and in-situ synchrotron X-ray diffraction. It is firstly found that Sn stabilizes β-phase and effectively suppresses the formation of ω-phase. Along with β-phase stability, we observe lowering of the austenite and martensite transformation temperature by ~100 K/at% and 88 K/at%, respectively. Increasing Sn decreases the martensitic transformation strain in Ti-Nb alloys by ~1.4%/at%, larger than that in Ti-Zr-Nb-Sn systems. The influence of Sn in martensitic Ti is anisotropic: causing larger reduction in lattice parameter b and higher decreases in elastic moduli of grain families that are aligned close to the b-axis. Finally, a {013}α , {031}α″,{122}α″ and {211}α″ quadruple texture was observed in martensitic Ti wire. At the early stage of deformation, detwinning quickly rotated {013}α″ and {211}α″ towards {031}α″ and {122}α″ components. After that, the strength of {031}α″ continued to increase, while the strength of {122}α″ texture was gradually decreased by dislocation slip as deformation continued.

Research Area(s)

  • Detwinning, Martensitic Ti, Phase transformation, Synchrotron, Texture

Bibliographic Note

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Citation Format(s)

Influence of Sn on martensitic beta Ti alloys. / Cai, S.; Wang, L.; Schaffer, J. E. et al.
In: Materials Science and Engineering A, Vol. 743, 16.01.2019, p. 764-772.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review