Effect of Hydrogen Charging on Martensitic Transformation of Austenitic Stainless Steels (Study on Low Temperature Materials Used in WE-NET10)

摘要

Austenitic stainless steels of type 304L and 316L are candidate materials for the storage and transportation vessels of the liquid hydrogen. These materials are metastable austenitic stainless steels and their mechanical properties at low temperature are affected by the strain-induced martensite. Therefore it is important to understand the effect of the hydrogen charging on the martensitic transformation. In this study, the strain-induced martensite contents of the hydrogen charged and non-charged materials were evaluated by using ferritscope, magnetscope and X-ray diffraction analysis. As the results, it was confirmed that the strain-induced martensite contents of hydrogen charged materials were less than those of non-charged materials by all methods, that is, the solution hydrogen restrained martensitic transformation.