A microstructural investigation on deformation mechanisms of Fe–18Cr–12Mn–0.05C metastable austenitic steels containing different amounts of nitrogen
- Authors
- Kermanpur, Ahmad; Behjati, Peiman; Han, Jeongho; Najafizadeh, Abbas; Lee, Young-Kook
- Issue Date
- Oct-2015
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Ni-free austenitic stainless steels; Deformation mechanism; Martensitic transformation; Nitrogen
- Citation
- MATERIALS & DESIGN, v.82, pp.273 - 280
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS & DESIGN
- Volume
- 82
- Start Page
- 273
- End Page
- 280
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/156144
- DOI
- 10.1016/j.matdes.2015.05.075
- ISSN
- 0264-1275
- Abstract
- Deformation mechanisms of the Ni-free Fe-18Cr-12Mn-0.05C (wt%) austenitic steels containing 0, 0.25 and 0.44 N were investigated. Effects of N addition, strain and temperature on the formation of deformation-induced epsilon- and alpha'-martensite phases were determined using transmission electron microscopy and electron back-scattered diffraction techniques. Based on the microstructural evolutions, it is proposed that deformation mechanism of these steels includes the sequence of gamma -> epsilon-martensite -> alpha'-martensite, in which the formation and stability of the epsilon-martensite is significantly enhanced by the N content. Increased deformation temperature from 298 to 373 K reduces the formation of epsilon-martensite (more than 80%).
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