期刊
STEEL RESEARCH INTERNATIONAL
卷 84, 期 8, 页码 812-817出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/srin.201300082
关键词
hydrogen embrittlement; hydrogen softening; austenitic stainless steel; ductility; cathodic charging; mechanical properties
资金
- Ministry of Knowledge Economy
- National Research Foundation of Korea in Republic of Korea [NRF-2012-0005932]
- National Research Foundation of Korea (NRF) [2010-0005775, 2011-0001684, 2009-0093814]
- Ministry of Education, Science and Technology
- National Research Foundation of Korea [2010-0005775] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The thin-plate specimen of 316L austenite stainless steel was charged with hydrogen using a cathodic charging technique. Despite the short diffusion distance of hydrogen predicted by the diffusion-controlled model for a semi-infinite sheet, the Vickers hardness measurements revealed the full effect of hydrogen in the center of the cross-sections of thin-plate specimens as well as in the vicinity of the outer surfaces, which appears to be due to the short-circuit diffusion mechanism along the grain boundaries. The room-temperature tensile properties of both undeformed and deformed (20, 40%) samples were examined and compared. Hydrogen softening was apparent in both types of samples. For example, the 40% deformed sample showed an approximately 17 and 7% lower yield and tensile strength, respectively, after H charging at a strain rate of 2 x 10(-4) s(-1) with a concomitant decrease in ductility compared to that without H.
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