Cleavage initiation in the intercritically reheated coarse-grained heat affected zone: Part II. Failure criteria and statistical effects

C.L. Davis, J.E. King

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In part 1 of this article, cleavage initiation in the intercritically reheated coarse-grained heat affected zone (IC CG HAZ) of high-strength low-alloy (HSLA) steels was determined to occur between two closely spaced blocky MA particles. Blunt notch, crack tip opening displacement (CTOD), and precracked Charpy testing were used in this investigation to determine the failure criteria required for cleavage initiation to occur by this mechanism in the IC CG HAZ. It was found that the attainment of a critical level of strain was required in addition to a critical level of stress. This does not occur in the case of high strain rate testing, for example, during precracked Charpy testing. A different cleavage initiation mechanism is then found to operate. The precise fracture criteria and microstructural requirements (described in part I of this article) result in competition between potential cleavage initiation mechanisms in the IC CG HAZ.
    Original languageEnglish
    Pages (from-to)3019-3029
    Number of pages11
    JournalMetallurgical and Materials Transactions A
    Volume27
    Issue number10
    DOIs
    Publication statusPublished - Oct 1996

    Keywords

    • crack initiation
    • fracture mechanics
    • heat affected zone
    • impact testing
    • strain rate
    • stress concentration
    • crack tip opening displacement
    • high strength low alloy steel
    • intercritically reheated coarse grained heat affected zone
    • precracked Charpy testing
    • steel

    Fingerprint Dive into the research topics of 'Cleavage initiation in the intercritically reheated coarse-grained heat affected zone: Part II. Failure criteria and statistical effects'. Together they form a unique fingerprint.

    Cite this