Development of a hydrogen absorption model to determine absorption kinetics and diffusion coefficients by means of carrier gas hot extraction
Development of a hydrogen absorption model to determine absorption kinetics and diffusion coefficients by means of carrier gas hot extraction
复制标题
开发氢气吸收模型，通过载气热萃取确定吸收动力学和扩散系数
DOI：
10.1016/j.ijhydene.2018.04.101
复制
发表时间：
--
影响因子：
7.2
通讯作者：
M. Oechsner
中科院分区：
文献类型：
--
作者：
M. Brilz ;J. Biehler;H. Hoche;M. Oechsner
机械测试样本的氢荷电状态的精确描述（包括空间和能量氢分布）被认为对于理解氢脆机制至关重要。这里，针对圆柱形样品开发了一种简单的液体充氢模型。吸收模型基于菲克扩散定律的近似解，并允许通过测量吸收的氢气总量作为气缸高度的函数来确定氢气扩散系数和表面浓度。采用载气热萃取法测量了多个调质钢42CrMo4（1.7225）钢瓶充装后的总氢含量，并通过数学拟合证明了吸收模型对测量的适用性。该材料的扩散系数确定为D= 3.8 10− 11 m 2/s，氢表面浓度随着充电时间的增加而增加。
Precise description of the hydrogen charged state of mechanical test specimens including the spatial and energetic hydrogen distribution is considered to be essential for understanding the mechanisms of hydrogen embrittlement. Here, a simple hydrogen absorption model for hydrogen charging in liquids was developed for cylindrical specimens. The absorption model is based on an approximate solution of Fick's laws of diffusion and allows determining hydrogen diffusion coefficients and surface concentrations by measuring the total amount of absorbed hydrogen as a function of the cylinder height. Total hydrogen contents after charging of several cylinders consisting of quenched and tempered steel 42CrMo4 (1.7225) were measured by carrier gas hot extraction and the applicability of the absorption model on the measurement was demonstrated by mathematical fitting. The diffusion coefficient for this material was determined to be D= 3.8 10− 11 m 2/s and the hydrogens surface concentration increases with increasing charging time.
登录
查看更多内容
阴极充氢过程中氢进入金属的机理分析
DOI：
--
发表时间：
1988
期刊：
影响因子：
--
作者：
R. iyer;H. Pickering;M. Zamanzadeh
通讯作者：
M. Zamanzadeh
DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
K. Bergers;E. Camisão de Souza;I. Thomas;N. Mabho;J. Flock
通讯作者：
J. Flock
使用原位方法研究氢传质的优点：中子射线照相与载气热萃取
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
A. Griesche;E. Solórzano;K. Beyer;T. Kannengiesser
通讯作者：
T. Kannengiesser
使用不同热萃取技术测量高温下的扩散氢含量 - 国际循环测试
DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
T. Kannengiesser;Nico Tiersch
通讯作者：
Nico Tiersch