A method to calculate hydrogen trap binding energy in austenitic stainless steel using local equilibrium model

A method to calculate hydrogen trap binding energy in austenitic stainless steel using local equilibrium model
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局部平衡模型计算奥氏体不锈钢氢阱结合能的方法

DOI:
10.1016/j.ijhydene.2018.10.079
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发表时间:
2018-12
影响因子:
7.2
通讯作者:
Cui Tiancheng
Cui Tiancheng
中科院分区:
工程技术2区
文献类型:
--
作者:
Hua Zhengli;Zhu Shengyi;Zhang Yiwei;Liu Ziliang;Cui Tiancheng

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陷阱结合能是理解氢在金属中行为的一个重要参数。然而,目前还缺乏一种可靠的、实用的方法来计算奥氏体不锈钢(γ-SS)的氢陷阱结合能。本文首先研究了局域平衡模型(LEM)模拟γ-SS氢解吸谱的有效性。结果表明,当试样厚度和升温速率足够小时,LEM可以可靠地计算γ-SS的氢热脱附谱。然后,采用有效的氢预放电方法简化氢脱附谱的数值拟合,并利用LEM建立了计算γ-SS中氢陷阱结合能的方法。最后,根据实验测得的氢热脱附谱,计算出S30408中位错的氢陷阱结合能为26.3kJ/mol。
The trap binding energy is an important parameter to understand the behavior of hydrogen in metals. Unfortunately, a reliable and practical method to calculate the hydrogen trap binding energy of austenitic stainless steels (γ-SS) is still lacking. In this work, the validity of local equilibrium model (LEM) for simulating the hydrogen desorption spectrum of γ-SS is studied first. Results show that LEM can be used to calculate the hydrogen thermal desorption spectrum of γ-SS reliably when the specimen thickness and heating rate are small enough. Then, an effective hydrogen pre-discharging method is used to simplify the numerical fitting of hydrogen desorption spectrum, and a method to calculate the hydrogen trap binding energy in γ-SS is developed using LEM. Finally, the hydrogen trap binding energy of dislocation in S30408 is calculated to be 26.3 kJ/mol on the basis of experimental hydrogen thermal desorption spectrum using the developed method.
DOI: --
发表时间: 1941
期刊: --
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