Grain structure and texture evolutions during single crystal casting of the Ni-Base superalloy CMSX-4

Seong Moon Seo, In Soo Kim, Je Hyun Lee, Chang Yong Jo, Hirofumi Miyahara, Keisaku Ogi

    研究成果: ジャーナルへの寄稿学術誌査読

    53 被引用数 (Scopus)

    抄録

    The solidification grain structure and texture evolutions during single crystal (SX) casting of the advanced Ni-base superalloy CMSX-4 have been investigated. In order to understand the development of the solidification grain structure, SX casting experiments were carried out with a specially designed grain selector in a Bridgman directional solidification (DS) furnace. In addition to casting trials, the SX casting process was simulated by a 3-D cellular automaton-finite element (CAFE) model. The predicted solidification grain structure and the texture evolutions were validated by comparison with the microstructural observation and the electron back scattered diffraction (EBSD) results. It was shown that the overall grain structure, crystallographic texture evolution, and the location where the final selection of the single crystal occurs can be predicted well by the present CAFE model. The axial texture evolution of the single crystal was found to be significantly influenced by the grain density at the chill surface. The CAFE predictions also revealed that the geometry of the grain selector plays a significant role in the final selection of the single crystal.

    本文言語英語
    ページ(範囲)391-398
    ページ数8
    ジャーナルMetals and Materials International
    15
    3
    DOI
    出版ステータス出版済み - 6月 2009

    !!!All Science Journal Classification (ASJC) codes

    • 凝縮系物理学
    • 材料力学
    • 金属および合金
    • 材料化学

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