Three-dimensional studies of intergranular carbides in austenitic stainless steel

Minoru Ochi, Rika Kawano, Takuya Maeda, Yukio Sato, Ryo Teranishi, Toru Hara, Masao Kikuchi, Kenji Kaneko

    研究成果: Contribution to journalArticle査読

    1 被引用数 (Scopus)


    A large number of morphological studies of intergranular carbides in steels have always been carried out in two dimensions without considering their dispersion manners. In this article, focused ion beam serial-sectioning tomography was carried out to study the correlation among the grain boundary characteristics, the morphologies and the dispersions of intergranular carbides in 347 austenitic stainless steel. More than hundred intergranular carbides were characterized in three dimensions and finally classified into three different types, two types of carbides probably semi-coherent to one of the neighboring grains with plate-type morphology, and one type of carbides incoherent to both grains with rod-type morphology. In addition, the rod-type carbide was found as the largest number of carbides among three types. Since large numbers of defects, such as misfit dislocations, may be present at the grain boundaries, which can be ideal nucleation sites for intergranular rod-type carbide precipitation.

    出版ステータス出版済み - 4 1 2017

    All Science Journal Classification (ASJC) codes

    • 構造生物学
    • 器械工学
    • 放射線学、核医学およびイメージング


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