Variation of work hardening rate by oxygen contents in pure titanium alloy

Duck Soo Kang, Kwang Jin Lee, Eui Pyo Kwon, Toshihiro Tsuchiyama, Setsuo Takaki

    Research output: Contribution to journalArticlepeer-review

    32 Citations (Scopus)

    Abstract

    Pure titanium-oxygen alloys with different oxygen contents were tensile-tested to investigate the effect of oxygen on work hardening rate and deformation behavior. Yield and ultimate tensile strengths markedly increased with increasing oxygen contents, although the elongations were decreased. Work hardening rate was also enhanced with increasing oxygen contents resulting in increase in the uniform elongation. The improved work hardening rate was ascribed to transition of primary deformation mode from twin deformation to dislocation slip by oxygen addition. When twin deformation is suppressed by oxygen addition, however, the 〈. c+. a〉 dislocation must function as a substitute for twinning to permit the homogeneous plastic deformation. It contributed that the improved work hardening rate without deformation twinning is thought to be a restriction of dislocation slips to a certain special plane by oxygen addition.

    Original languageEnglish
    Pages (from-to)120-126
    Number of pages7
    JournalMaterials Science and Engineering A
    Volume632
    DOIs
    Publication statusPublished - Apr 4 2015

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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