Journal
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
Volume 71, Issue 6, Pages 909-917Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/maco.201911357
Keywords
hydrogen-induced cracking; hydrogen permeability; steel
Funding
- Grantova Agentura Ceske Republiky [17-22586S]
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Hydrogen diffusivity and trapping have been studied in two advanced high strength steel grades and model samples using electrochemical permeation test. Microstructures of CP1000 and DP1000 steels consist of ferrite, martensite and a small fraction of retained austenite. In addition, bainite is present in CP1000. Model phases with predominance of a particular phase have been prepared by specific heat treatment. DP1000 has shown the lowest diffusivity among all materials, while ferritic model sample has shown the highest. Differences in hydrogen diffusion coefficient values are linked to trapping microstructural characteristics and grain size.
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