Micro mechanics based on vacancy diffusion coupled with damage mechanics related to creep deformation and prediction of creep fracture life

Toshimitsu Yokobori, Kunihiko Abe, Hironori Tsukidate, Toshihito Omi, Ryuji Sugiura, Haruki Ishikawa

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    In situ observations of crack growth and damage progression were conducted under creep conditions for P92 and titanium aluminides inter-metallic compound. A proposed analysis of stress induced particle diffusion was applied to stress induced vacancy diffusion. Results obtained from this analysis were successfully correlated with the experimental behaviour of macroscopic damage progression and a theoretical characteristic of creep deformation was derived. It was found to be in good agreement with experimental characteristics of creep deformation. Furthermore, the experimental characteristics of creep damage progression which concern voids and micro crack formations at grain boundary were found to be well correlated with those of deformation. From these results, correlation between vacancy diffusion in nano-scale, creep damage in mezzo-scale and creep deformation in macro-scale were successfully realized.

    Original languageEnglish
    Pages (from-to)126-136
    Number of pages11
    JournalMaterials at High Temperatures
    Volume28
    Issue number2
    DOIs
    Publication statusPublished - 2011 Jul 1

    Keywords

    • Alpha; multiplication method
    • Creep deformation law
    • Damage mechanics
    • P92
    • Stress induced vacancy diffusion
    • Titanium aluminides inter-metallic compound

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

    Fingerprint Dive into the research topics of 'Micro mechanics based on vacancy diffusion coupled with damage mechanics related to creep deformation and prediction of creep fracture life'. Together they form a unique fingerprint.

  • Cite this