Nanoscale mechanism and intrinsic structure related deformation of Ti-alloys

J. Eckert*, J. Das, W. Xu, R. Theissmann

*Corresponding author for this work

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A series of Ti-Nb-Ta-(In/Cr) and Ti-Fe-(Sn) alloys containing a bcc β-Ti phase with a grain size ranging from the nanometer/ultrafine regime to the micrometer scale has been prepared by slow cooling from the melt. The plastic deformation behavior has been investigated under compression and the deformation-induced microstructure evolution was checked by X-ray diffraction, scanning and transmission electron microscopy. The data reveal that the underlying mechanisms related to plasticity or brittleness of the β-phase depends significantly on the supersaturation, the local lattice strain, the ease of dislocation slip, as well as twinning and diffusionless transformation triggering grain refinement. The intrinsic structure, the short-range order and the stability of the β-Ti phase have a strong influence on the mode of plastic deformation of the investigated Ti-alloys.

Original languageEnglish
Pages (from-to)71-78
Number of pages8
JournalMaterials Science and Engineering A
Volume493
Issue number1-2
DOIs
Publication statusPublished - 15 Oct 2008
Externally publishedYes

Keywords

  • Dendrite
  • Nanoeutectic
  • Phase stability
  • Plasticity
  • Ti-base alloys

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