期刊
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
卷 4, 期 6, 页码 545-551出版社
TAYLOR & FRANCIS LTD
DOI: 10.1016/j.stam.2003.12.006
关键词
Hydrogen diffusion; Hydrogen visualization; Steels
资金
- Ministry of Education, Culture, Sports, Science, and Technology of Japan
Hydrogen diffusion in steels was examined by both a high sensitivity hydrogen microprint technique (HMT) and an electrochemical hydrogen permeation method. The main diffusion path in an extremely low carbon steel was lattice within grains; grain boundaries were not accelerated diffusion paths. In the case of a hypo-eutectoid steel, hydrogen diffused through proeutectoid ferrite and ferrite in pearlite under steady-state of hydrogen diffusion. The diffusion paths, however, were carbide/ferrite interfaces when hydrogen charging was interrupted before achievement of the steady state. This is probably ascribable to the reversible trapping effect of the interface. The detection efficiency of the high sensitivity HMT was 75% for the low carbon steel and 40% for the hypo-eutectoid steel. (C) 2004 Elsevier Ltd. All rights reserved.
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