Assessment of mechanical degradation in pressure vessel steel by morphological analysis of carbides

    Authors

    J. W. Byeon; S. I. Kwun;K. M. Kang

    Comments

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    Keywords

    thermal degradation; carbide morphology; M6C carbide; 2.25Cr-1Mo steel; 2.25CR-1MO STEEL; THERMAL-DEGRADATION; TEMPERATURES; CREEP; Materials Science, Ceramics; Materials Science, Characterization &; Testing; Materials Science, Composites

    Abstract

    In this study, mechanical degradations in 2.25Cr-1Mo steel were evaluated by quantitative morphological analysis of carbides. Based on the morphology, carbides were classified as globular, fine acicular, rod, and grain boundary one. Mean size of carbides were determined as a function of morphology and thermal degradation time at 630 degrees C. Area fraction of grain boundary carbides and fraction of grain boundary M6C carbides were observed to increase rapidly in the initial stage of degradation and then gradually afterwards. Both mean size of globular carbide and fraction of grain boundary M6C carbides were linearly correlated with strength. Potentials of carbide morphology analysis as a health monitoring technique were discussed, in term of correlation coefficient with strength.

    Journal Title

    Advanced Nondestructuve Evaluation I, Pts 1 and 2, Proceedings

    Volume

    321-323

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    561

    Last Page

    564

    WOS Identifier

    WOS:000241427900124

    ISSN

    1013-9826; 0-87849-412-x

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