Visualization of hydrogen diffusion in steels by high sensitivity hydrogen microprint technique
Visualization of hydrogen diffusion in steels by high sensitivity hydrogen microprint technique
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DOI：
10.1016/j.stam.2003.12.006
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发表时间：
2003-01
影响因子：
5.5
通讯作者：
Koji Ichitani;M. Kanno
中科院分区：
文献类型：
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作者：
Koji Ichitani;M. Kanno
采用高灵敏度氢微印技术（HMT）和电化学氢渗透法研究了氢在钢中的扩散。极低碳钢中的主要扩散路径是晶内晶格，晶界不是加速扩散路径。在亚共析钢的情况下，氢在稳定的氢扩散状态下通过先共析铁素体和珠光体中的铁素体扩散。然而，当充氢在达到稳态之前中断时，扩散路径是碳化物/铁素体界面。这可能是由于界面的可逆捕获效应。高灵敏度HMT对低碳钢的检测效率为75%，对亚共析钢的检测效率为40%。
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.