HYDROGEN-MICROSTRUCTURE INTERACTIONS IN BCC FeCr ALLOYS BY IN-SITU NANOINDENTATION

摘要

Environment sensitive failure, such as hydrogen embrittlement, of metallic alloys and particularly steels is a longstanding problem causing large annual economical loses. A deeper understanding of the individual mechanisms leading to the final material breakdown is highly demanded. Hydrogen can be incorporated into the material from different liquid or gas sources, during material processing or in operation conditions; the mechanisms leading to the material failure depend on the absorbed hydrogen interaction with trap binding sites or defects, as it is the case of dislocations.