The effect of nanosized (Ti,Mo)C precipitates on hydrogen embrittlement of tempered lath martensitic steel

Akihide Nagao; May L. Martin; Mohsen Dadfarnia; Petros Sofronis; Ian M. Robertson

doi:10.1016/j.actamat.2014.04.051

The effect of nanosized (Ti,Mo)C precipitates on hydrogen embrittlement of tempered lath martensitic steel

Akihide Nagao, May L. Martin, Mohsen Dadfarnia, Petros Sofronis, Ian M. Robertson

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

196 Citations (Scopus)

Abstract

Nanosized (Ti,Mo)C precipitates in a high-strength tempered lath martensitic steel are shown to increase resistance to hydrogen embrittlement. The hydrogen-induced failure mode transitions from failure along lath and prior austenite boundaries in the absence of the (Ti,Mo)C precipitates to a mixed failure mode of microvoid coalescence and lath boundary failure in their presence. In the absence of hydrogen and regardless of the presence or absence of the (Ti,Mo)C precipitates, failure occurs via ductile microvoid coalescence. By correlating the macroscale mechanical properties, the fractography of the resulting failure surfaces and observation of the evolved deformation structure immediately beneath the fracture surfaces, a hydrogen-enhanced and plasticity-mediated failure mechanism is proposed in which the role of the nanosized (Ti,Mo)C precipitates is to serve as effective traps for hydrogen.

Original language	English
Pages (from-to)	244-254
Number of pages	11
Journal	Acta Materialia
Volume	74
DOIs	https://doi.org/10.1016/j.actamat.2014.04.051
Publication status	Published - Aug 1 2014

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2014.04.051

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title = "The effect of nanosized (Ti,Mo)C precipitates on hydrogen embrittlement of tempered lath martensitic steel",

abstract = "Nanosized (Ti,Mo)C precipitates in a high-strength tempered lath martensitic steel are shown to increase resistance to hydrogen embrittlement. The hydrogen-induced failure mode transitions from failure along lath and prior austenite boundaries in the absence of the (Ti,Mo)C precipitates to a mixed failure mode of microvoid coalescence and lath boundary failure in their presence. In the absence of hydrogen and regardless of the presence or absence of the (Ti,Mo)C precipitates, failure occurs via ductile microvoid coalescence. By correlating the macroscale mechanical properties, the fractography of the resulting failure surfaces and observation of the evolved deformation structure immediately beneath the fracture surfaces, a hydrogen-enhanced and plasticity-mediated failure mechanism is proposed in which the role of the nanosized (Ti,Mo)C precipitates is to serve as effective traps for hydrogen.",

author = "Akihide Nagao and Martin, {May L.} and Mohsen Dadfarnia and Petros Sofronis and Robertson, {Ian M.}",

note = "Funding Information: This work was supported by the DOE EERE Fuel Cells program through Grant GO 15045 and funding by JFE Steel Corporation. Microscopy work was carried out in part in the Center for Microanalysis of Materials in the Frederick Seitz Materials Research Laboratory at the University of Illinois. The authors acknowledge the support from the World Premier International Research Center Initiative (WPI), MEXT, Japan, through the International Institute for Carbon-Neutral Energy Research (I2CNER) of Kyushu University. The authors would also like to acknowledge Prof. B. Heuser at the University of Illinois and Dr. B. Somerday at the Sandia National Laboratories for fruitful discussions. A.N. acknowledges and thanks laboratory members of the I.M.R. group, especially T.J. Williams, B.P. Eftink, S.D. House and G.S. Liu, for assistance, support and discussions. ",

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AU - Nagao, Akihide

AU - Martin, May L.

AU - Dadfarnia, Mohsen

AU - Sofronis, Petros

AU - Robertson, Ian M.

N1 - Funding Information: This work was supported by the DOE EERE Fuel Cells program through Grant GO 15045 and funding by JFE Steel Corporation. Microscopy work was carried out in part in the Center for Microanalysis of Materials in the Frederick Seitz Materials Research Laboratory at the University of Illinois. The authors acknowledge the support from the World Premier International Research Center Initiative (WPI), MEXT, Japan, through the International Institute for Carbon-Neutral Energy Research (I2CNER) of Kyushu University. The authors would also like to acknowledge Prof. B. Heuser at the University of Illinois and Dr. B. Somerday at the Sandia National Laboratories for fruitful discussions. A.N. acknowledges and thanks laboratory members of the I.M.R. group, especially T.J. Williams, B.P. Eftink, S.D. House and G.S. Liu, for assistance, support and discussions.

PY - 2014/8/1

Y1 - 2014/8/1

N2 - Nanosized (Ti,Mo)C precipitates in a high-strength tempered lath martensitic steel are shown to increase resistance to hydrogen embrittlement. The hydrogen-induced failure mode transitions from failure along lath and prior austenite boundaries in the absence of the (Ti,Mo)C precipitates to a mixed failure mode of microvoid coalescence and lath boundary failure in their presence. In the absence of hydrogen and regardless of the presence or absence of the (Ti,Mo)C precipitates, failure occurs via ductile microvoid coalescence. By correlating the macroscale mechanical properties, the fractography of the resulting failure surfaces and observation of the evolved deformation structure immediately beneath the fracture surfaces, a hydrogen-enhanced and plasticity-mediated failure mechanism is proposed in which the role of the nanosized (Ti,Mo)C precipitates is to serve as effective traps for hydrogen.

AB - Nanosized (Ti,Mo)C precipitates in a high-strength tempered lath martensitic steel are shown to increase resistance to hydrogen embrittlement. The hydrogen-induced failure mode transitions from failure along lath and prior austenite boundaries in the absence of the (Ti,Mo)C precipitates to a mixed failure mode of microvoid coalescence and lath boundary failure in their presence. In the absence of hydrogen and regardless of the presence or absence of the (Ti,Mo)C precipitates, failure occurs via ductile microvoid coalescence. By correlating the macroscale mechanical properties, the fractography of the resulting failure surfaces and observation of the evolved deformation structure immediately beneath the fracture surfaces, a hydrogen-enhanced and plasticity-mediated failure mechanism is proposed in which the role of the nanosized (Ti,Mo)C precipitates is to serve as effective traps for hydrogen.

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The effect of nanosized (Ti,Mo)C precipitates on hydrogen embrittlement of tempered lath martensitic steel

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