Chemical hydrogen charging conditions for martensite transformation and surface cracking in type 304 stainless steel

Journal Article · Fri May 07 04:00:00 EDT 1999 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(99)00093-7· OSTI ID:361719

Yang, Q; Qiao, L J; Luo, J L ^[1]; Chiovelli, S ^[2]

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1. Univ. of Alberta, Edmonton, Alberta (Canada). Dept. of Chemical and Materials Engineering
2. Syncrude Canada Ltd., Edmonton, Alberta (Canada). Research Center

It is well known that the presence of hydrogen in 304 stainless steel can induce martensite transformation and surface cracking in austenitic stainless steels. The change in microstructure would affect the corrosion behavior. Martensite could be preferentially dissolved, which results in an increase in anodic dissolution and facilitates the formation of active paths for stress corrosion cracking. Hydrogen-induced martensite has some effects on pitting corrosion and is also found to be related to hydrogen embrittlement. In previous reports, almost all the results were obtained by charging the specimens at very high cathodic current densities ({ge}50mA/cm{sup 2}). The objective of this work is to investigate the critical charging conditions for hydrogen-induced martensitic transformation and surface cracking of 304 stainless steel.

• OSTI ID: 361719
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 11 Vol. 40; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRACKS
CRYSTAL-PHASE TRANSFORMATIONS
HYDROGEN EMBRITTLEMENT
MARTENSITE
METALLOGRAPHY
METALLURGICAL EFFECTS
STAINLESS STEEL-304
X-RAY DIFFRACTION