액체수소 저장 및 운용에 활용되는 소재의 초저온 환경에서의 특성 분석

Abstract

In this study, based on the research conducted in 2023, a study was conducted to identify the strength and durability characteristics in an ultra-low temperature environment by hydrogen embrittlement of materials used for eco-friendly liquid hydrogen storage and operation. The test specimens used in the ultra-low temperature experiment were manufactured in the form of a plate by selecting SUS316L, an austenitic stainless steel mainly used for hydrogen storage containers. The SUS416L test specimen has a nickel content of 10.07% and a chromium content of 16.65%, and in a tensile test using electrochemical hydrogen charging applied to the ISO 16573 test method, it was shown that there was almost no decrease in elongation or deterioration in mechanical strength. Based on these results, the experimental content is described to determine what changes and differences there are in elongation and mechanical strength in an ultra-low temperature environment of -253℃.