Journal
SCRIPTA MATERIALIA
Volume 62, Issue 5, Pages 242-245Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2009.11.007
Keywords
Hydrogen embrittlement; Dislocation; Residual stress; Magnetic force microscopy; Atomic force microscopy
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In situ electrochemical hydrogen charging in combination with atomic force microscopy and optical microscopy has been used to study the effect of hydrogen on the austenite phase in super duplex stainless steel. Observations showed that hydrogen charging results in an irreversible deformation of austenite. High residual tensile stresses form in austenite during quench annealing. These stresses, in combination with the activation of dislocation sources by hydrogen, result in formation of slip lines on the austenite surface during in situ hydrogen charging. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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