Formation of domain structures in ordering processes of B2 and D0 3 types

Ryuichiro Oguma, Syo Matsumura, Tetsuo Eguchi

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Time-dependent Ginzburg-Landau (TDGL) formulation has been developed for ordering processes of B2 and D03 types in binary alloy systems. In the formulation three order parameters are defined to describe the state of order. Equivalent variants of B2 and D03 structures are distinguished with the order parameters. The mean-field free energy is defined in a form of Landau type expansion with the order parameters and a composition parameter. Interfacial energies due to local variations of degrees of order and concentration are given with gradient square approximation. Kinetic equations are derived from the Ginzburg-Landau type potential to describe time-evolutions of the order parameters and the concentration. Two-dimensional numerical simulations were performed on the basis of the derived kinetic equations. The results reproduce well the formation of B2 and D03 ordered domains in the processes in an Fe3Al alloy.

本文言語英語
ホスト出版物のタイトルThermodynamics and Kinetics of Phase Transformations in Inorganic Materials
出版社Materials Research Society
ページ79-84
ページ数6
ISBN(印刷版)9781604234282
DOI
出版ステータス出版済み - 2006
イベント2006 MRS Fall Meeting - Boston, MA, 米国
継続期間: 11 27 200612 1 2006

出版物シリーズ

名前Materials Research Society Symposium Proceedings
979
ISSN(印刷版)0272-9172

その他

その他2006 MRS Fall Meeting
Country米国
CityBoston, MA
Period11/27/0612/1/06

All Science Journal Classification (ASJC) codes

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

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