Simulations of TDGL equations for B2 type ordering with two-step phase separation in Fe-Ni-Al alloys

Ryuichiro Oguma, Syo Matsumura, Minoru Doi, Satoshi Hata, Keisuke Ogata

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

The present authors recently developed a time-dependent Ginzburg-Landau (TDGL) formulation for ordering processes of B2 and D03 in binary alloys, taking into account the symmetrical relationships between these ordered phases. Kinetic equations for time-evolution of order parameters and the composition one are derived from the Ginzburg-Landau type potential consisting of a mean-field free energies and interfacial energy terms. On the other hand, coauthors have investigated domain structures in two-step phase separation of Fe-based Fe-Ni-Al alloys. Micro-structures in the superalloys consist of B2 ordered domains and A2 disordered matrices in the first stage of phase separation. The second stage during a subsequent aging leads to formation of B2 domains and A2 phase regions in the former A2 matrices and B2 domains, respectively. The evolution of three-dimensional domain structures and composition profiles has been analyzed by electron tomography imaging and energy-dispersive X-ray spectroscopy. In this work the authors have applied the TDGL formulation to this alloy system, and performed three-dimensional numerical simulations assuming the thermal processing. The results of the simulations well reproduced the characteristics of the micro-structures obtained from the observations.

本文言語英語
ホスト出版物のタイトルPTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
編集者Long-Qing Chen, Matthias Militzer, Gianluigi Botton, James Howe, Chadwick Sinclair, Hatem Zurob
出版社International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
ページ287-294
ページ数8
ISBN(電子版)9780692437360
出版ステータス出版済み - 2015
イベントInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015 - Whistler, カナダ
継続期間: 6月 28 20157月 3 2015

出版物シリーズ

名前PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015

その他

その他International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015
国/地域カナダ
CityWhistler
Period6/28/157/3/15

!!!All Science Journal Classification (ASJC) codes

  • 化学工学(全般)
  • 無機化学
  • 材料化学
  • 金属および合金

フィンガープリント

「Simulations of TDGL equations for B2 type ordering with two-step phase separation in Fe-Ni-Al alloys」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル