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Investigation of the effect of electrolytic hydrogen charging of X70 steel: I. The effect of microstructure on hydrogen-induced cold cracking and blistering

Journal Article


Abstract


  • By using electrolytic hydrogen charging, differences in hydrogen pick-up, trapping,

    hydrogen-induced cold cracking (HICC) and blistering were investigated for an X70 steel for

    a range of processing and microstructural conditions: as-rolled strip (banded ferritepearlite,

    BFP); transfer bar (ferrite-granular bainite, FGB); normalised and annealed transfer

    bar (equiaxed ferrite-pearlite, EFP); and a simulated grain coarsened heat affected zone

    (GCHAZ) (bainitic ferrite, BF). The microstructure was found to have a profound effect on

    the response to electrolytic hydrogen charging, with the BFP structure being the most

    susceptible to HICC and the development of surface blisters. In contrast, the simulated

    GCHAZ structure did not show any blistering for the maximum charging time of 24 h.

    These trends are consistent with the ratios of residual to total hydrogen content obtained

    for the same charging conditions (charging time; electrolyte, current density and sample

    geometry). The ratio decreased in the order BFP (46%), EFP (34%), FGB (33%), and BF (14%),

    reflecting the relative capacities of the different microstructures for strong trapping of

    hydrogen and the related susceptibility to HICC.

Publication Date


  • 2016

Citation


  • Dunne, D. P., Hejazi, D., Saleh, A. A., Haq, A. J., Calka, A. & Pereloma, E. V. (2016). Investigation of the effect of electrolytic hydrogen charging of X70 steel: I. The effect of microstructure on hydrogen-induced cold cracking and blistering. International Journal of Hydrogen Energy, 41 (28), 12411-12423.

Scopus Eid


  • 2-s2.0-84991577926

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6069

Number Of Pages


  • 12

Start Page


  • 12411

End Page


  • 12423

Volume


  • 41

Issue


  • 28

Abstract


  • By using electrolytic hydrogen charging, differences in hydrogen pick-up, trapping,

    hydrogen-induced cold cracking (HICC) and blistering were investigated for an X70 steel for

    a range of processing and microstructural conditions: as-rolled strip (banded ferritepearlite,

    BFP); transfer bar (ferrite-granular bainite, FGB); normalised and annealed transfer

    bar (equiaxed ferrite-pearlite, EFP); and a simulated grain coarsened heat affected zone

    (GCHAZ) (bainitic ferrite, BF). The microstructure was found to have a profound effect on

    the response to electrolytic hydrogen charging, with the BFP structure being the most

    susceptible to HICC and the development of surface blisters. In contrast, the simulated

    GCHAZ structure did not show any blistering for the maximum charging time of 24 h.

    These trends are consistent with the ratios of residual to total hydrogen content obtained

    for the same charging conditions (charging time; electrolyte, current density and sample

    geometry). The ratio decreased in the order BFP (46%), EFP (34%), FGB (33%), and BF (14%),

    reflecting the relative capacities of the different microstructures for strong trapping of

    hydrogen and the related susceptibility to HICC.

Publication Date


  • 2016

Citation


  • Dunne, D. P., Hejazi, D., Saleh, A. A., Haq, A. J., Calka, A. & Pereloma, E. V. (2016). Investigation of the effect of electrolytic hydrogen charging of X70 steel: I. The effect of microstructure on hydrogen-induced cold cracking and blistering. International Journal of Hydrogen Energy, 41 (28), 12411-12423.

Scopus Eid


  • 2-s2.0-84991577926

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6069

Number Of Pages


  • 12

Start Page


  • 12411

End Page


  • 12423

Volume


  • 41

Issue


  • 28