Effects of temperature cycling and nitrogen on the stability of microstructures in austenitic stainless steels

Journal Article · Tue Jan 15 00:00:00 EST 2008 · Materials Characterization

DOI:https://doi.org/10.1016/j.matchar.2006.10.011· OSTI ID:21062178

Dai, Q X ^[1]; Zhang, Q ^[1]; Cheng, X N; Chen, K M ^[1]

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1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Xuefu Road 301, Jiangsu 212013 (China)

The influence of temperature cycling from room temperature to 77 K on nitrogen-alloyed austenitic stainless steels, Fe24Mn13Cr0.4N, Fe24Mn18Cr3Ni0.6N, Fe1Mn19Cr8Ni0.2N and Fe17Mn14Cr1Ni0.4N, has been studied by optical microscopy and scanning electronic microscopy (SEM). Results show that the phase transformation from austenite to {epsilon} martensite takes place due to the temperature cycling and stress concentration, whereas nitrogen can stabilize the austenitic microstructures greatly. Finally, the mechanism of the phase transformation and the structure of {epsilon} martensite are discussed in detail.

• OSTI ID: 21062178
• Journal Information: Materials Characterization, Vol. 59, Issue 1; Other Information: DOI: 10.1016/j.matchar.2006.10.011; PII: S1044-5803(06)00288-9; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
AUSTENITIC STEELS
CHROMIUM ALLOYS
MANGANESE ALLOYS
MARTENSITE
MICROSTRUCTURE
NICKEL ALLOYS
NITROGEN
OPTICAL MICROSCOPY
PHASE TRANSFORMATIONS
SCANNING ELECTRON MICROSCOPY
STABILITY
STRESSES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K