Hydrogen Embrittlement of Very High Strength Steels after Severe Hydrogen Charging

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F08%3A00019570" target="_blank" >RIV/61989100:27360/08:00019570 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Hydrogen Embrittlement of Very High Strength Steels after Severe Hydrogen Charging
Original language description
Hydrogen embrittlement mechanisms of two very high strength steels (VHSS) with ultimate tensile strength reaching 1000 MPa were studied in severe hydrogen charging conditions. These VHSS were a TRIP steel (A) and a Cr-Mo-V alloyed steel (B). They were submitted to a cathodic charging in an acid solution with an addition of As2O3, acting as a promoter of hydrogen absorption. Electrochemical permeation technique and subsequent hydrogen dosage by thermal desorption tests provided values for hydrogen diffusion characteristics. A and B steels present diffusivity of 2.8 x 10-11 m2 x s-1 and 2.2 x 10-10 m2 x s-1. Hydrogen solubility was different in both steels, but residual hydrogen content appeared to be very low for both steels. Otherwise, tensile tests performed on hydrogenated steels showed a higher loss of ductility. Fracture surface observations suggest brittle failures: transgranular brittle failure for the steel A and intergranular brittle failure for the steel B. Resistance to the h
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JG - Metallurgy, metal materials
OECD FORD branch
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Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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