Hydrogen re-embrittlement Environmentally assisted cracking Galvanic protection High strength steel
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Artola-Beobide, G.(Garikoitz); Aldazabal, J. (Javier). "Hydrogen Assisted Fracture of 30MnB5 High Strength Steel: A Case Study". Metals. 10 (12), 2020,
When steel components fail in service due to the intervention of hydrogen assisted cracking,
discussion of the root cause arises. The failure is frequently blamed on component design, working
conditions, the manufacturing process, or the raw material. This work studies the influence of quench
and tempering and hot-dip galvanizing on the hydrogen embrittlement behavior of a high strength
steel. Slow strain rate tensile testing has been employed to assess this influence. Two sets of specimens
have been tested, both in air and immersed in synthetic seawater, at three process steps: in the
delivery condition of the raw material, after heat treatment and after heat treatment plus hot-dip
galvanizing. One of the specimen sets has been tested without further manipulation and the other set
has been tested after applying a hydrogen effusion treatment. The outcome, for this case study, is that
fracture risk issues only arise due to hydrogen re-embrittlement in wet service.