Hydrogen-induced cracking at grain and twin boundaries in an Fe-Mn-C austenitic steel

Motomichi Koyama; Eiji Akiyama; Takahiro Sawaguchi; Dierk Raabe; Kaneaki Tsuzaki

doi:10.1016/j.scriptamat.2011.12.015

Hydrogen-induced cracking at grain and twin boundaries in an Fe-Mn-C austenitic steel

Motomichi Koyama, Eiji Akiyama, Takahiro Sawaguchi, Dierk Raabe, Kaneaki Tsuzaki

Research output: Contribution to journal › Article › peer-review

173 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	459-462
Number of pages	4
Journal	Scripta Materialia
Volume	66
Issue number	7
DOIs	https://doi.org/10.1016/j.scriptamat.2011.12.015
Publication status	Published - Apr 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2011.12.015

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title = "Hydrogen-induced cracking at grain and twin boundaries in an Fe-Mn-C austenitic steel",

abstract = "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.",

author = "Motomichi Koyama and Eiji Akiyama and Takahiro Sawaguchi and Dierk Raabe and Kaneaki Tsuzaki",

note = "Funding Information: M.K. acknowledges the Research Fellowship of the Japan Society for the Promotion of Science for Young Scientists. The Materials Manufacturing and Engineering Station and Materials Analysis Station at the National Institute for Materials Science supported this work through the production of the samples and carrying out the analysis of the chemical compositions. The microstructural observations were supported by Ms. N. Elhami and Mr. T. J{\"a}pel at Max-Planck-Institut f{\"u}r Eisenforschung. ",

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AU - Koyama, Motomichi

AU - Akiyama, Eiji

AU - Sawaguchi, Takahiro

AU - Raabe, Dierk

AU - Tsuzaki, Kaneaki

N1 - Funding Information: M.K. acknowledges the Research Fellowship of the Japan Society for the Promotion of Science for Young Scientists. The Materials Manufacturing and Engineering Station and Materials Analysis Station at the National Institute for Materials Science supported this work through the production of the samples and carrying out the analysis of the chemical compositions. The microstructural observations were supported by Ms. N. Elhami and Mr. T. Jäpel at Max-Planck-Institut für Eisenforschung.

PY - 2012/4

Y1 - 2012/4

N2 - 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.

AB - 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.

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JO - Scripta Materialia

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IS - 7

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Hydrogen-induced cracking at grain and twin boundaries in an Fe-Mn-C austenitic steel

Abstract

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