Nanocrystalline Steels’ Resistance to Hydrogen Embrittlement

The aim of this study is to determine the susceptibility to hydrogen embrittlement in X37CrMoV5-1 steel with two different microstructures: a nanocrystalline carbide-free bainite and tempered martensite. The nanobainitic structure was obtained by austempering at the bainitic transformation zone. It...

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Bibliographic Details
Published in:Archives of metallurgy and materials 2015-04, Vol.60 (1), p.491-496
Main Authors: Skołek, E., Marciniak, S., Skoczylas, P., Kamiński, J., świątnicki, W.A.
Format: Article
Language:English
Subjects:
austempering
carbide-free bainite
hydrogen embrittlement
tool steel
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Summary:The aim of this study is to determine the susceptibility to hydrogen embrittlement in X37CrMoV5-1 steel with two different microstructures: a nanocrystalline carbide-free bainite and tempered martensite. The nanobainitic structure was obtained by austempering at the bainitic transformation zone. It was found, that after hydrogen charging, both kinds of microstructure exhibit increased yield strength and strong decrease in ductility. It has been however shown that the resistance to hydrogen embrittlement of X37CrMoV5-1 steel with nanobainitic structure is higher as compared to the tempered martensite. After hydrogen charging the ductility of austempered steel is slightly higher than in case of quenched and tempered (Q&T) steel. This effect was interpreted as a result of phase composition formed after different heat treatments.
ISSN:2300-1909
1733-3490
2300-1909
DOI:10.1515/amm-2015-0079