SIMS investigation of internal hydrogen behavior of TWIP steel

摘要

Austenitic high Mn twin-induced plasticity (TWIP) steels have been widely investigated due to itsexcellent combination of strength and ductility[1] . However, its high susceptibility of hydrogenembrittlement (HE) limits the wide spread of TWIP steels in producing structural components such as oilpipeline, LNG tank, and offshore structure. Therefore, many investigations have been made to elucidatethe mechanisms responsible for the HE, and to alleviate HE either by alloy addition [2] or microstructuremodification [3] . Nevertheless, there have been many issues to be clarified, such as (1) precise analysis onthe amount of hydrogen, which is responsible for the HE, (2) interaction of hydrogen and various defects(dislocations and grain boundaries) and so on.