Phase stabilization by ultra grain refinement inmetastable austenite

Setsuo Takaki, Kazuhiro Fukunaga, Junaidi Syarif, Toshihiro Tsuchitama

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    When steels have a high martensitic transformation temperature above room temperature, the transformation behavior is not affected by the difference in the austenite (y) grain size, because they have a large chemical driving force for the martensitic transformation. However, in the case of metastable γ phase, the stability of γ depends on they grain size because the chemical driving force is not so large that the nucleation of martensite is affected by the size of room. In this paper, the behavior of martensitic transformation was investigated in a metastable austenitic steel (13Cr-11Ni steel) with different grain size from 0.8μm to 80μm and the mechanism of γ phase stabilization was discussed in connection with the morphological change of martensite. As a result, it was found that ultra grain refinement to the revel of submicron causes a change in the transformation mechanism from "multi variant" to "single variant" and that the difficulty of single variant transformation leads to the phase stabilization of γ.

    Original languageEnglish
    Title of host publicationProceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005
    EditorsJ.M. Howe, D.E. Laughlin, J.K. Lee, U. Dahmen, W.A. Soffa
    Pages259-266
    Number of pages8
    Volume2
    Publication statusPublished - 2005
    EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005 - Phoenix, AZ
    Duration: 29 May 20053 Jun 2005

    Other

    OtherInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005
    CityPhoenix, AZ
    Period29/5/053/6/05

    Fingerprint

    Grain refinement
    Martensitic transformations
    Austenite
    Stabilization
    Martensite
    Metastable phases
    Austenitic steel
    Steel
    Nucleation
    Temperature

    Keywords

    • Grain refinement
    • Isothermal transformation
    • Martensitic transformation
    • Metastable austenite
    • Multi variant
    • Single variant
    • Thermal stability

    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

    Takaki, S., Fukunaga, K., Syarif, J., & Tsuchitama, T. (2005). Phase stabilization by ultra grain refinement inmetastable austenite. In J. M. Howe, D. E. Laughlin, J. K. Lee, U. Dahmen, & W. A. Soffa (Eds.), Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005 (Vol. 2, pp. 259-266)

    Phase stabilization by ultra grain refinement inmetastable austenite. / Takaki, Setsuo; Fukunaga, Kazuhiro; Syarif, Junaidi; Tsuchitama, Toshihiro.

    Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005. ed. / J.M. Howe; D.E. Laughlin; J.K. Lee; U. Dahmen; W.A. Soffa. Vol. 2 2005. p. 259-266.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Takaki, S, Fukunaga, K, Syarif, J & Tsuchitama, T 2005, Phase stabilization by ultra grain refinement inmetastable austenite. in JM Howe, DE Laughlin, JK Lee, U Dahmen & WA Soffa (eds), Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005. vol. 2, pp. 259-266, International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005, Phoenix, AZ, 29/5/05.
    Takaki S, Fukunaga K, Syarif J, Tsuchitama T. Phase stabilization by ultra grain refinement inmetastable austenite. In Howe JM, Laughlin DE, Lee JK, Dahmen U, Soffa WA, editors, Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005. Vol. 2. 2005. p. 259-266
    Takaki, Setsuo ; Fukunaga, Kazuhiro ; Syarif, Junaidi ; Tsuchitama, Toshihiro. / Phase stabilization by ultra grain refinement inmetastable austenite. Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005. editor / J.M. Howe ; D.E. Laughlin ; J.K. Lee ; U. Dahmen ; W.A. Soffa. Vol. 2 2005. pp. 259-266
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