Microscopic properties of long-period ordering in Al-Rich TiAl alloys

S. Hata, T. Nakano, N. Kuwano, M. Itakura, S. Matsumura, Y. Umakoshi

研究成果: ジャーナルへの寄稿学術誌査読

8 被引用数 (Scopus)

抄録

The ordering mechanism of long-period superstructures (LPSs) in Al-rich TiAl alloys has been investigated by high-resolution transmission electron microscopy (HRTEM). The LPSs are classified in terms of arrangements of base clusters with different shapes and compositions formed in Ti-rich (002) layers of L 10-TiAl matrix: square Ti4Al, fat rhombus Ti3Al, and lean rhombus Ti2Al type clusters. The HRTEM observations revealed that antiphase boundaries of long-range-ordered LPS domains and short-range-ordered microdomains are constructed by various space-filling arrangements of the base clusters. Such a microscopic property characterized by the base clusters and their arrangements is markedly analogous to that of the 〈1,1/2,0〉* special-point ordering alloys such as Ni-Mo.

本文言語英語
ページ(範囲)1610-1617
ページ数8
ジャーナルMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
39
7
DOI
出版ステータス出版済み - 7月 2008

!!!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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