Some long-period superstructures and the related motion of dislocations in Al-rich TiAl single crystals

Takayoshi Nakano, Satoshi Hata, Koutarou Hayashi, Yukichi Umakoshi

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

1 被引用数 (Scopus)

抄録

Various long-period superstructures that appear in Al-rich TiAl are composed of three pairs of primitive cells, Ti2Al, Ti3Al, and Ti4Al, having periodic atomic arrangements in unique shapes of lean rhombi, fat rhombi, and squares, respectively, on the (002) Ti layers. These primitive cells can produce long-period superstructures such as Al 5Ti3, Al3Ti2, and h-Al 2Ti. The long-period superstructures play an important role in the operative deformation mode, configuration of dislocations, and related plastic deformation behavior in Al-rich TiAl, depending on the Al concentration. Fourfold ordinary dislocations, for example, often move as a group in the Al5Ti3 superstructure in the shapes of lean rhombi and squares embedded in the L10 matrix. In this study, the relationship between the periodic long-period superstructures and dislocation motion will be discussed from the viewpoint of anti-phase boundaries that form in each superstructure and their energies. The plastic deformation behavior in Al 5Ti3 and h-Al2Ti single-phase single crystals is also discussed.

本文言語英語
ホスト出版物のタイトルMaterials Properties, Characterization, and Modeling
出版社Minerals, Metals and Materials Society
ページ797-804
ページ数8
ISBN(印刷版)9781118296097
DOI
出版ステータス出版済み - 2012
イベント141st Annual Meeting and Exhibition, TMS 2012 - Orlando, FL, 米国
継続期間: 3月 11 20123月 15 2012

出版物シリーズ

名前TMS Annual Meeting
2

その他

その他141st Annual Meeting and Exhibition, TMS 2012
国/地域米国
CityOrlando, FL
Period3/11/123/15/12

!!!All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 材料力学
  • 金属および合金

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