Relaxation process in quenched-in vacancies during annealing in B2 FeAl single crystals

Tomohide Haraguchi, Fuminobu Hori, Kyosuke Yoshimi, Shuji Hanada, Ryuichiro Oshima, Akihiro Iwase, Hitoshi Hashimoto

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Coincidence Doppler broadening (CDB) technique and position lifetime measurement were used to investigate the relaxation process in quenched-in vacancies during annealing in Fe-48mol%Al single crystals quenched from 1373 K. The electron momentum curve of the as-quenched FeAl normalized by the pure Fe curve obtained from CDB was analogous to that of pure Al. After annealing at 673 K for 86.4 ks, the shape of the momentum curve became similar to that of pure Fe when normalized by pure AL These results suggest that vacancies on Al-sublattice sites were newly created during relaxation of quenched-in vacancies. The CDB and the positron annihilation measurements show that positron trapping sites are constricted after annealing at 873 K for 60 s and 673 K for 86.4 ks, and retained vacancies migrate under these heat treatment conditions. It is suggested that these vacancies change into secondary defects having smaller open volumes than the vacancies, e.g., sessile dislocations, stacking fault tetrahedras and so on.

本文言語English
ホスト出版物のタイトルPositron Annihilation
ホスト出版物のサブタイトルProceedings of the 13th International Conference on Positron Annihilation, ICPA-13
編集者Toshio Hyodo, Haruo Saito, Yoshinori Kobayashi, Yasuyuki Nagashima
出版社Trans Tech Publications Ltd
ページ99-101
ページ数3
ISBN(印刷版)9780878499366
DOI
出版ステータスPublished - 2004
イベントPositron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13 - Kyoto, Japan
継続期間: 2003 9 72003 9 12

出版物シリーズ

名前Materials Science Forum
445-446
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Other

OtherPositron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13
国/地域Japan
CityKyoto
Period03/9/703/9/12

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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