Strengthening and hydrogen embrittlement of ultrafine-grained Fe-0.01mass% C alloy processed by high-pressure torsion

Yoji Mine; Shunsaku Matsumoto; Zenji Horita

doi:10.1016/j.corsci.2011.05.052

Strengthening and hydrogen embrittlement of ultrafine-grained Fe-0.01mass% C alloy processed by high-pressure torsion

Yoji Mine, Shunsaku Matsumoto, Zenji Horita

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

20 Citations (Scopus)

Abstract

This study was conducted to elucidate the effects of annealing and hydrogenation on the tensile properties of an Fe-0.01. mass% C alloy processed by high-pressure torsion (HPT). By HPT processing, the tensile strength was increased to ∼1500. MPa through grain refinement. Low-temperature annealing further strengthened the HPT-processed specimen because of a simultaneous effect of carbide precipitation and grain refinement. Reduction in the dislocation density and the fraction of low-angle grain boundaries through warm-temperature annealing led to a decrease in hydrogen uptake when the specimens were exposed to high-pressure gaseous hydrogen, and they became less sensitive to hydrogen embrittlement (HE).

Original language	English
Pages (from-to)	2969-2977
Number of pages	9
Journal	Corrosion Science
Volume	53
Issue number	9
DOIs	https://doi.org/10.1016/j.corsci.2011.05.052
Publication status	Published - Sept 2011

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

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10.1016/j.corsci.2011.05.052

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title = "Strengthening and hydrogen embrittlement of ultrafine-grained Fe-0.01mass% C alloy processed by high-pressure torsion",

abstract = "This study was conducted to elucidate the effects of annealing and hydrogenation on the tensile properties of an Fe-0.01. mass% C alloy processed by high-pressure torsion (HPT). By HPT processing, the tensile strength was increased to ∼1500. MPa through grain refinement. Low-temperature annealing further strengthened the HPT-processed specimen because of a simultaneous effect of carbide precipitation and grain refinement. Reduction in the dislocation density and the fraction of low-angle grain boundaries through warm-temperature annealing led to a decrease in hydrogen uptake when the specimens were exposed to high-pressure gaseous hydrogen, and they became less sensitive to hydrogen embrittlement (HE).",

author = "Yoji Mine and Shunsaku Matsumoto and Zenji Horita",

note = "Funding Information: This research was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan in the Innovative Area “Bulk Nanostructured Metals”, and in part by the NEDO, Fundamental Research Project on Advanced Hydrogen Science (2006–2012). A part of this research was carried out within the frame of Kyushu University Interdisciplinary Programs in Education and Projects in Research Development (P&P).",

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AU - Mine, Yoji

AU - Matsumoto, Shunsaku

AU - Horita, Zenji

N1 - Funding Information: This research was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan in the Innovative Area “Bulk Nanostructured Metals”, and in part by the NEDO, Fundamental Research Project on Advanced Hydrogen Science (2006–2012). A part of this research was carried out within the frame of Kyushu University Interdisciplinary Programs in Education and Projects in Research Development (P&P).

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N2 - This study was conducted to elucidate the effects of annealing and hydrogenation on the tensile properties of an Fe-0.01. mass% C alloy processed by high-pressure torsion (HPT). By HPT processing, the tensile strength was increased to ∼1500. MPa through grain refinement. Low-temperature annealing further strengthened the HPT-processed specimen because of a simultaneous effect of carbide precipitation and grain refinement. Reduction in the dislocation density and the fraction of low-angle grain boundaries through warm-temperature annealing led to a decrease in hydrogen uptake when the specimens were exposed to high-pressure gaseous hydrogen, and they became less sensitive to hydrogen embrittlement (HE).

AB - This study was conducted to elucidate the effects of annealing and hydrogenation on the tensile properties of an Fe-0.01. mass% C alloy processed by high-pressure torsion (HPT). By HPT processing, the tensile strength was increased to ∼1500. MPa through grain refinement. Low-temperature annealing further strengthened the HPT-processed specimen because of a simultaneous effect of carbide precipitation and grain refinement. Reduction in the dislocation density and the fraction of low-angle grain boundaries through warm-temperature annealing led to a decrease in hydrogen uptake when the specimens were exposed to high-pressure gaseous hydrogen, and they became less sensitive to hydrogen embrittlement (HE).

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Strengthening and hydrogen embrittlement of ultrafine-grained Fe-0.01mass% C alloy processed by high-pressure torsion

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