Temperature dependence of the yield stress in α-titanium investigated with crystal plasticity analysis

Yelm Okuyama, Masaki Tanaka, Tetsuya Ohashi, Tatsuya Morikawa

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The effect of the activated slip systems on the temperature dependence of yield stress was investigated in α-Ti by using crystal plasticity finite element method. A model for finite element analysis (FEA) was constructed based on experimental results. The displacement in FEA was applied up to the nominal strain of 4% which is the same strain as the experimental one. Stress-strain curves were obtained, which corresponds to experimental data taken every 50 K between 73 K and 673 K. The used material constants which are temperature dependent were elastic constants, and lattice friction stresses. The lattice friction stresses of basal slip systems were set to be higher than that of pyramidal slip systems at 73 K. Then, the lattice friction stresses were set to be closer as the temperature increases. It was found that the activation of slip systems is strong temperature dependent, and that the yield stress depends on the number of active slip systems.

    Original languageEnglish
    Title of host publicationTHERMEC 2018
    EditorsR. Shabadi, Mihail Ionescu, M. Jeandin, C. Richard, Tara Chandra
    PublisherTrans Tech Publications Ltd
    Pages1474-1478
    Number of pages5
    ISBN (Print)9783035712087
    DOIs
    Publication statusPublished - Jan 1 2018
    Event10th International Conference on Processing and Manufacturing of Advanced Materials, 2018 - Paris, France
    Duration: Jul 9 2018Jul 13 2018

    Publication series

    NameMaterials Science Forum
    Volume941 MSF
    ISSN (Print)0255-5476
    ISSN (Electronic)1662-9752

    Conference

    Conference10th International Conference on Processing and Manufacturing of Advanced Materials, 2018
    Country/TerritoryFrance
    CityParis
    Period7/9/187/13/18

    All Science Journal Classification (ASJC) codes

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

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