Journal
SCRIPTA MATERIALIA
Volume 66, Issue 7, Pages 459-462Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.12.015
Keywords
Austenitic steel; Tension test; Electron backscattering; Hydrogen embrittlement; Twinning
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Funding
- Japan Society for the Promotion of Science for Young Scientists
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Hydrogen embrittlement was observed in an Fe-18Mn-1.2C (wt.%) steel. The tensile ductility was drastically reduced by hydrogen charging during tensile testing. The fracture mode was mainly intergranular fracture, though transgranular fracture was also partially observed. The transgranular fracture occurred parallel to the primary and secondary deformation twin boundaries, as confirmed by electron backscattering diffraction analysis and orientation-optimized electron channeling contrast imaging. The microstructural observations indicate that cracks are initiated at grain boundaries and twin boundaries. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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