Change in Slip Mode with Temperature in Ti–0.49 mass%O

DOI Web Site Web Site 4 Citations 8 References
  • Tanaka Masaki
    Department of Materials Science and Engineering, Kyushu University
  • Hayashi Yukihiro
    Department of Materials Science and Engineering, Kyushu University
  • Okuyama Yelm
    Department of Materials Science and Engineering, Kyushu University
  • Morikawa Tatsuya
    Department of Materials Science and Engineering, Kyushu University
  • Higashida Kenji
    Department of Materials Science and Engineering, Kyushu University

Search this article

Abstract

<p>The temperature dependence of 0.2% proof stress was investigated in Ti–0.49 mass%O with an α single phase. The 0.2% proof stress decreased as the temperature increased from 77 to 573 K. The athermal stress, which was defined as the average of the stress values for which the temperature dependence was absent above 573 K, was found to be 70 MPa. The temperature dependence of the effective stress indicates that the temperature dependence of the effective stress changed at around 400 K. To study the thermally activated process that controls the yielding in Ti, the temperature dependence of the activation volume was also measured. An inverse temperature dependence of the activation volume was found at between 325 and 400 K, suggesting that the thermally activated process of dislocation glide changed at this temperature. Prismatic slip with ⟨a⟩ dislocations was dominant at low temperatures, whereas other slips were activated at high temperatures. The activation enthalpy for the dislocation glide was also measured between 77 and 573 K.</p>

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 60 (1), 80-85, 2019-12-01

    The Japan Institute of Metals and Materials

Citations (4)*help

See more

References(8)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top