Determining the effective hydrogen diffusion coefficient in 100Cr6

被引：10

作者：

Kuerten, Dominik ^{[1
]}

Khader, Iyas ^{[1
,2
]}

Kailer, Andreas ^{[1
]}

机构：

[1] Fraunhofer Inst Mech Mat IWM, Tribol, Freiburg, Germany

[2] German Jordanian Univ, Dept Ind Engn, Amman, Jordan

来源：

MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2020年 / 71卷 / 06期

关键词：

100Cr6; bearing steel; effective diffusion coefficient; hydrogen diffusion; permeation cell; trapped hydrogen; GENERAL MATHEMATICAL-DESCRIPTION; PERMEATION; STEEL; IRON; MICROSTRUCTURE; SOLUBILITY; METALS; MODELS;

D O I：

10.1002/maco.201911322

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 degrees C was found to be D-eff = 4.9 x 10(-12) m(2)/s.

引用

页码：918 / 923

页数：6

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