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

Research output: Contribution to journalArticle

Abstract

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 1 173 K, which probably contributed to its high-temperature strength.

Original languageEnglish
Pages (from-to)1459-1466
Number of pages8
Journalisij international
Volume58
Issue number8
DOIs
Publication statusPublished - Aug 15 2018

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Austenitic stainless steel
Precipitates
Nitrogen
Transmission electron microscopy
Scanning electron microscopy
Nitrides
Temperature
Tomography
Heat treatment
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Nanostructural analyses of intra- and intergranular precipitates in high-temperature heat-treated nitrogen-added austenitic stainless steel. / Ochi, Minoru; Sato, Kousei; Teranishi, Ryo; Sato, Yukio; Hamada, Jun Ichi; Takushima, Chikako; Hara, Toru; Kaneko, Kenji.

In: isij international, Vol. 58, No. 8, 15.08.2018, p. 1459-1466.

Research output: Contribution to journalArticle

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AU - Sato, Yukio

AU - Hamada, Jun Ichi

AU - Takushima, Chikako

AU - Hara, Toru

AU - Kaneko, Kenji

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