In the present study, the diffusion constant for hydrogen in hardened 100Cr6 was measured in permeation tests. The tests were conducted on samples of different thicknesses. The diffusivity of hydrogen was also measured in prestrained samples to study the influence of plastic strain on the diffusion rate. A finite element‐based diffusion model was applied to confirm the experimental results by computing the concentrations of diffusible hydrogen and trapped hydrogen due to deformation‐induced defects. The results showed that the concentration of trapped hydrogen remained very low throughout the plastic strain regime under consideration. The average effective diffusion coefficient of hydrogen in 100Cr6 at 30°C was found to be D_eff = 4.9 × 10⁻¹² m²/s.

中文翻译：

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确定100Cr6中的有效氢扩散系数

在本研究中，在渗透测试中测量了氢在硬化的100Cr6中的扩散常数。测试是在不同厚度的样品上进行的。还测量了预应变样品中氢的扩散率，以研究塑性应变对扩散速率的影响。通过计算基于变形引起的缺陷的可扩散氢和捕获氢的浓度，应用了基于有限元的扩散模型来确认实验结果。结果表明，在所考虑的整个塑性应变状态下，捕获的氢的浓度仍然很低。发现氢在30°C下在100Cr6中的平均有效扩散系数为D _eff  = 4.9×10 ^-12  m ²/ s。