Hydrogen-induced delayed fracture of a Fe-22Mn-0.6C steel pre-strained at different strain rates

Motomichi Koyama; Eiji Akiyama; Kaneaki Tsuzaki

doi:10.1016/j.scriptamat.2012.02.040

Hydrogen-induced delayed fracture of a Fe-22Mn-0.6C steel pre-strained at different strain rates

Motomichi Koyama, Eiji Akiyama, Kaneaki Tsuzaki

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

52 Citations (Scopus)

Abstract

Hydrogen-induced delayed fracture under loading was investigated in a Fe-22Mn-0.6C twinning-induced plasticity steel that had been pre-deformed at various strain rates. Hydrogen-induced delayed fracture was suppressed by increasing the strain rate of the pre-deformation. In this study on the strain-rate effect, factors affecting the delayed fracture were found to be the negative strain-rate sensitivity of flow stress, stress drop caused by the relaxation phenomenon, and the increase in material strength due to strain aging.

Original language	English
Pages (from-to)	947-950
Number of pages	4
Journal	Scripta Materialia
Volume	66
Issue number	11
DOIs	https://doi.org/10.1016/j.scriptamat.2012.02.040
Publication status	Published - Jun 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.2012.02.040

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title = "Hydrogen-induced delayed fracture of a Fe-22Mn-0.6C steel pre-strained at different strain rates",

abstract = "Hydrogen-induced delayed fracture under loading was investigated in a Fe-22Mn-0.6C twinning-induced plasticity steel that had been pre-deformed at various strain rates. Hydrogen-induced delayed fracture was suppressed by increasing the strain rate of the pre-deformation. In this study on the strain-rate effect, factors affecting the delayed fracture were found to be the negative strain-rate sensitivity of flow stress, stress drop caused by the relaxation phenomenon, and the increase in material strength due to strain aging.",

author = "Motomichi Koyama and Eiji Akiyama and Kaneaki Tsuzaki",

note = "Funding Information: M.K. acknowledges a Research Fellowship of NIMS Junior Researcher (2009-2010) and the Japan Society for the Promotion of Science for Young Scientists (2011). We would also like to acknowledge Dr. Takahiro Sawaguchi for taking part in the discussions during the experiments. POSCO supported this work by providing the samples and funding. ",

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doi = "10.1016/j.scriptamat.2012.02.040",

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T1 - Hydrogen-induced delayed fracture of a Fe-22Mn-0.6C steel pre-strained at different strain rates

AU - Koyama, Motomichi

AU - Akiyama, Eiji

AU - Tsuzaki, Kaneaki

N1 - Funding Information: M.K. acknowledges a Research Fellowship of NIMS Junior Researcher (2009-2010) and the Japan Society for the Promotion of Science for Young Scientists (2011). We would also like to acknowledge Dr. Takahiro Sawaguchi for taking part in the discussions during the experiments. POSCO supported this work by providing the samples and funding.

PY - 2012/6

Y1 - 2012/6

N2 - Hydrogen-induced delayed fracture under loading was investigated in a Fe-22Mn-0.6C twinning-induced plasticity steel that had been pre-deformed at various strain rates. Hydrogen-induced delayed fracture was suppressed by increasing the strain rate of the pre-deformation. In this study on the strain-rate effect, factors affecting the delayed fracture were found to be the negative strain-rate sensitivity of flow stress, stress drop caused by the relaxation phenomenon, and the increase in material strength due to strain aging.

AB - Hydrogen-induced delayed fracture under loading was investigated in a Fe-22Mn-0.6C twinning-induced plasticity steel that had been pre-deformed at various strain rates. Hydrogen-induced delayed fracture was suppressed by increasing the strain rate of the pre-deformation. In this study on the strain-rate effect, factors affecting the delayed fracture were found to be the negative strain-rate sensitivity of flow stress, stress drop caused by the relaxation phenomenon, and the increase in material strength due to strain aging.

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JF - Scripta Materialia

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ER -

Hydrogen-induced delayed fracture of a Fe-22Mn-0.6C steel pre-strained at different strain rates

Abstract

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