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The effects of replacing Ni with Mn on hydrogen embrittlement in Cr-Ni-Mn-N austenitic steels

Title
The effects of replacing Ni with Mn on hydrogen embrittlement in Cr-Ni-Mn-N austenitic steels
Authors
Noh, H.-S.Kang, J.-H.Kim, K.-M.Kim, S.-J.
Date Issued
May-2019
Publisher
Pergamon Press Ltd.
Abstract
Hydrogen embrittlement (HE) in Cr-Ni-Mn-N austenitic stainless steels was investigated when Ni was replaced with the equivalent Mn concentration while maintaining a constant Ni equivalent Ni-eq. Although Ni and Mn have similar effects on Ni-eq, the tendency for strain-induced martensite (SIM) transformation and H redistribution was controlled by stacking fault energy, which depended on the relative concentrations of Ni and Mn, and on the degree of H pre-charging. H transport along dislocations caused H-2 out-gassing during deformation, and H trapping at austenite/SIM interfaces increased HE. Replacing Ni with Mn reduced the stability of austenite and increased the HE susceptibility.
URI
http://oasis.postech.ac.kr/handle/2014.oak/100309
ISSN
0010-938X
Article Type
Article
Citation
Corrosion Science, vol. 152, page. 93 - 100, 2019-05
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 KIM, SUNG JOON
Graduate Institute of Ferrous Technology
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