Nanostructural Analyses of Intra- and Intergranular Precipitates in High-temperature Heat-treated Nitrogen-added Austenitic Stainless Steel

Minoru Ochi; Kousei Sato; Ryo Teranishi; Yukio Sato; Jun-ichi Hamada; Chikako Takushima; Toru Hara; Kenji Kaneko

doi:10.2355/isijinternational.ISIJINT-2017-756

Chemical and Physical Analysis

Nanostructural Analyses of Intra- and Intergranular Precipitates in High-temperature Heat-treated Nitrogen-added Austenitic Stainless Steel

Minoru Ochi, Kousei Sato, Ryo Teranishi, Yukio Sato, Jun-ichi Hamada, Chikako Takushima, Toru Hara, Kenji Kaneko

著者情報

Minoru Ochi
Department of Materials Science and Engineering, Graduate School of Engineering, Kyushu University
Kousei Sato
Department of Materials Science and Engineering, Graduate School of Engineering, Kyushu University
Ryo Teranishi
Department of Materials Science and Engineering, Graduate School of Engineering, Kyushu University
Yukio Sato
Department of Materials Science and Engineering, Graduate School of Engineering, Kyushu University
Jun-ichi Hamada
Research & Development Center, Nippon Steel and Sumikin Stainless Steel Corporation
Chikako Takushima
Research & Development Center, Nippon Steel and Sumikin Stainless Steel Corporation
Toru Hara
Research Center for Structural Materials, National Institute for Materials Science
Kenji Kaneko 責任著者
Department of Materials Science and Engineering, Graduate School of Engineering, Kyushu University

キーワード: nitrogen-added austenitic stainless steel, intragranular precipitates, intergranular precipitates, FIB-SEM serial-sectioning, TEM-SAED pattern, STEM-EDS

ジャーナルオープンアクセス HTML

2018 年 58 巻 8 号 p. 1459-1466

DOI https://doi.org/10.2355/isijinternational.ISIJINT-2017-756

詳細

抄録

More than one thousand intragranular and intergranular precipitates of nitrogen-added austenitic stainless steel, SUSXM15J1, were characterized by FIB-SEM serial-sectioning tomography, by conventional transmission electron microscopy (TEM) and by scanning transmission electron microscopy (STEM). All of intragranular precipitates were found nitrided to form dichromium nitride, Cr₂N, two types of intergranular precipitates were found Cr₂N and Cr₃Ni₂Si(N), and some of them were grown and jointed due to the additional heat treatment during the tensile test at 1173 K, which probably contributed to its high-temperature strength.

More than 1000s of precipitates were characterized three dimensionally by FIB-SEM serial sectioning tomography. Fullsize Image

責任著者(Corresponding author)

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