In order to simulate the real hydrogen-load environmet,an in-situ electrochemical hydrogen charging slow strain rate tensile is designed to simulate the real hydrogen load environment,and the effect of in-situ and pre-hydrogen charging on the hydrogen embrittlement sensitivity of 304 austenitic stainless steel is studied.The results show that 304 austenitic stainless steel exhibits lower strength and higher hydrogen embrittlement sensitivity after in-situ electrochemical hydrogen charging tensile test compared with the pre-hydrogen charging tensile test,and no obvious Martensite transformation occurs.The sample has serious hydrogen induced fracture at the early stage of deformation,which is of great significance for understanding the hydrogen embrittlement behavior of stainless steel in a real hydrogen load environment.
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