Mechanism of brittle-to-ductile transition understood by the interaction between a crack and dislocations

Kenji Higashda, Masaki Tanaka

    Research output: Contribution to journalReview articlepeer-review

    3 Citations (Scopus)

    Abstract

    Fundamental mechanism governing the fracture toughness of materials is reviewed in terms of a concept of the interaction between a crack and dislocations. The mechanism of brittle-to-ductile transition (BDT) is demonstrated using a simple model based on dislocation dynamics and the theory of crack-tip shielding by dislocations. The effects of dislocation mobility as well as dislocation sources on the BDT behavior are discussed, which enables us to understand the various factors such as grain refinement influencing fracture toughness.

    Original languageEnglish
    Pages (from-to)195-200
    Number of pages6
    JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
    Volume97
    Issue number4
    DOIs
    Publication statusPublished - 2011

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Physical and Theoretical Chemistry
    • Metals and Alloys
    • Materials Chemistry

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