Computer models of phase separation dynamics in Fe-Cr-Mo ternary alloys

Y. Iwamoto, K. Goto, T. Kuwajima, E. Fukuhara, Y. Suwa, Y. Saito

Research output: Contribution to journalArticle

Abstract

Three dimensional microstructures resulting from phase separation in thermally aged Fe-Cr-Mo ternary alloys were investigated by using Monte Carlo simulation and numerical solution of the Cahn-Hilliard equation. The Monte Carlo simulation result indicates that Cr rich regions were formed in an Fe-40at.%Cr-5at.%Mo alloy and that Mo atoms enriched into the Cr rich region and/or boundaries of Cr/Fe rich regions. Behaviors of the major and minor elements, Mo and Cr, in an Fe-40at.%Mo-5at.%Cr alloy were similar to those of Cr and Mo in the Fe-40at.%Cr-5at.%Mo alloy. The first peak position of the structure factor of a major element moved to the shorter side of the wave number with the increase of aging temperature. Analysis of the static structure factor of a minor element indicates that the bifurcation formation of concentration profile of the minor element occurs at peak positions of the major element, which is predicted by a theory based on the Cahn-Hilliard equation.

Original languageEnglish
Pages (from-to)1059-1064
Number of pages6
JournalUnknown Journal
Volume426-432
Issue number2
Publication statusPublished - 2003

Keywords

  • Cahn-Hilliard equation
  • Computer simulation
  • Iron-chromium-molybdenum alloys
  • Monte Carlo method
  • Phase separation

ASJC Scopus subject areas

  • Materials Science(all)

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    Iwamoto, Y., Goto, K., Kuwajima, T., Fukuhara, E., Suwa, Y., & Saito, Y. (2003). Computer models of phase separation dynamics in Fe-Cr-Mo ternary alloys. Unknown Journal, 426-432(2), 1059-1064.