Thermal stability of microstructure in grain boundary character distribution-optimized and cold-worked austenitic stainless steel developed for nuclear reactor application

Shinichiro Yamashita, Yasuhide Yano, Ryusuke Tanikawa, Norihito Sakaguchi, Seiichi Watanabe, Masanori Miyagi, Shinya Sato, Hiroyuki Kokawa

研究成果: Conference contribution

抄録

Grain boundary character distribution-optimized (GBCD) Type 316 corresponding austenitic stainless steel and its cold-worked form (GBCD+CW) are prospective materials to be considered for next generation nuclear energy systems. Specimens of these steels were thermally-aged at 973 K for 1 and 100 h and then examined by transmission electron microscopy (TEM) to evaluate microstructural stability during heat treatment high temperature. TEM results revealed that microstructures of both specimens types prior to ageing contained step-wise boundaries which were composed of coincidence site lattice (CSL) boundaries. The GBCD+CW specimens had dislocation cells and networks as well as deformation twins whereas the GBCD one possessed few dislocations. After thermal ageing, the precipitates were formed on not only random grain boundaries but also on dislocations, and they contribute to prevent significant microstructural change such as recrystallization and dislocation recovery.

本文言語English
ホスト出版物のタイトルMaterials Research Needs to Advance Nuclear Energy
ページ121-126
ページ数6
出版ステータスPublished - 2010
イベント2009 MRS Fall Meeting - Boston, MA, United States
継続期間: 2009 11 302009 12 4

出版物シリーズ

名前Materials Research Society Symposium Proceedings
1215
ISSN(印刷版)0272-9172

Other

Other2009 MRS Fall Meeting
国/地域United States
CityBoston, MA
Period09/11/3009/12/4

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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