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 1173 K. which probably contributed to its high-temperature strength.

Original languageEnglish
Pages (from-to)8-15
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume105
Issue number4
DOIs
Publication statusPublished - Apr 2019

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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