Computer simulation of spinodal decomposition in duplex stainless steels

Yoshiyuki Saito

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

    1 Citation (Scopus)

    Abstract

    Numerical simulations of phase separation in Fe-Cr-Mo?Ni or Fe-Cr-Mo-Ti quaternary alloys similar to ferrite phases in duplex stainless steles were performed by the Cahn-Hilliard equation. We obtained that the asymptotic behavior of minor element Ni, Mo, Ti in an Fe-Cr-X quaternary alloy along a trajectory of a peak top of the major element Cr is classified into three groups according to the sign of the second derivative of the chemical free energy with respect to the compositions of Cr and X(X=Mo, Ni or Ti]. It is also predicted that that small addition of Mo up to 10% accelerates phase separation of Cr. It seems that the optimum value of Mo exists to enhance the phase separation of Cr in Fe-Cr-Mo ternary alloys. Simulation result indicates that the phase separation of Cr is most enhanced with addition of 1% Mo. The above mentioned simulation results given by the numerical simulation by the Cahn-Hilliard equation were in good agreement with those obtained by the Monte Carlo simulation Theoretical analyses were performed in order to discuss the simulation results. On the basis of theb simulation results Optimum materials design of the duplex stainless steel has been established.

    Original languageEnglish
    Title of host publicationMaterials Science Forum
    Pages1509-1514
    Number of pages6
    Volume706-709
    DOIs
    Publication statusPublished - 2012
    Event7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011 - Quebec City, QC
    Duration: 2011 Aug 12011 Aug 5

    Publication series

    NameMaterials Science Forum
    Volume706-709
    ISSN (Print)02555476

    Other

    Other7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011
    CityQuebec City, QC
    Period11/8/111/8/5

    Keywords

    • Asymptotic behavior
    • Duplex stainless
    • Fe-Cr-N-Mo alloys
    • Implicit method
    • Numerical simulation
    • Spinodal decomposition

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering
    • Mechanics of Materials

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  • Cite this

    Saito, Y. (2012). Computer simulation of spinodal decomposition in duplex stainless steels. In Materials Science Forum (Vol. 706-709, pp. 1509-1514). (Materials Science Forum; Vol. 706-709). https://doi.org/10.4028/www.scientific.net/MSF.706-709.1509