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| HYDROGEN DAMAGE AND HYDROGEN-INDUCED CRACKING FOR RAIL STEEL |
| HUANG Changhe LI Jinxu WANG Yanbin CHU Wuyang (University of Science and Technology Beijing 100083)MEI Dongsheng YU Mengwen JI Kebin (Panzhihua Iron and steel Co. Panzhihua 710076) |
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Abstract Critical concentrations of diffusible hydrogen and total hydrogen for hydrogen-induced irreversible damage were C0(P)=(2.07±0.49)×10-4% and C(P)=(3.13±0.59)×10-4%,respectively. The critical concentration of diffusible hydrogen for hydrogen-induced ductility loss and delayed failure, however, was about 0.26×10-4%. The elongation ratio of the charged specimen to uncharged one was directly proportional to C0-1, i.e., δH/δ0=-0.05±0.27/C0. The normalized threshold stress for hydrogen-induced delayed failure σth/σf was σth/σf = 0.27ln(Cth/C0) where σf is the ultimate tensile strength, Cth = 9.5 × 10-4% being the critical concentration of accumulated hydrogen necessary to hydrogen-induced cracking.
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Received: 25 April 1997
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Cite this article:
HUANG Changhe LI Jinxu WANG Yanbin CHU Wuyang (University of Science and Technology Beijing 100083)MEI Dongsheng YU Mengwen JI Kebin (Panzhihua Iron and steel Co. Panzhihua 710076). HYDROGEN DAMAGE AND HYDROGEN-INDUCED CRACKING FOR RAIL STEEL. J Chin Soc Corr Pro, 1997, 17(2): 129-134.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1997/V17/I2/129
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