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 journalArticlepeer-review

    15 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 languageEnglish
    Pages (from-to)2969-2977
    Number of pages9
    JournalCorrosion Science
    Volume53
    Issue number9
    DOIs
    Publication statusPublished - Sep 2011

    All Science Journal Classification (ASJC) codes

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

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