2020/11
10.3390/met10121613
Metals 2020
Altzairuak, B+G+i, Breakage, Galvanic protection, Garikoitz Artola, High Strength Steels, Hydrogen embrittlement, Hydrogen Induced Cracking, Ingurugiroagatiko pitzadura, Javier Aldazabal, Konformatze Teknologiak
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.
Garikoitz Artola, Javier Aldazabal (Tecnun).
hydrogen re-embrittlement; environmentally assisted cracking; galvanic protection; high strength steel.