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Effect of Grain Boundary Carbide on Hydrogen Embrittlement in Stable Austenitic Stainless Steels

Title
Effect of Grain Boundary Carbide on Hydrogen Embrittlement in Stable Austenitic Stainless Steels
Authors
Kim, K.-S.Kang, J.-H.Kim, S.-J.
Date Issued
Jun-2019
Publisher
IRON STEEL INST JAPAN KEIDANREN KAIKAN
Abstract
The effect of grain boundary precipitates on hydrogen embrittlement was investigated with a stable austenitic stainless steel, Fe-20Cr-11Ni-5Mn-2Mo-0.5Si-0.3N-0.1C (wt.%). The steels were aged to form M23C6 along the grain boundaries and electrochemically charged with hydrogen. Based on the fractography and silver decoration results, it was found that hydrogen seemed to be concentrated at M23C6/austenite interfaces, and have promoted crack initiation and propagation. Accordingly, hydrogen-induced ductility loss was intensified in the aged alloys.
URI
http://oasis.postech.ac.kr/handle/2014.oak/100307
ISSN
0915-1559
Article Type
Article
Citation
ISIJ INTERNATIONAL, vol. 59, no. 6, page. 1136 - 1144, 2019-06
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 KIM, SUNG JOON
Graduate Institute of Ferrous Technology
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