ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Chemical and Physical Analysis
Nanostructural Analyses of Intra- and Intergranular Precipitates in High-temperature Heat-treated Nitrogen-added Austenitic Stainless Steel
Minoru OchiKousei SatoRyo TeranishiYukio SatoJun-ichi HamadaChikako TakushimaToru HaraKenji Kaneko
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2018 Volume 58 Issue 8 Pages 1459-1466

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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.

More than 1000s of precipitates were characterized three dimensionally by FIB-SEM serial sectioning tomography. Fullsize Image
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© 2018 by The Iron and Steel Institute of Japan
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