A Method for Measuring the Activation Energy of Hydrogen Trap in Austenitic Stainless Steel
An austenitic stainless steel, activation energy technology, applied in the field of material hydrogen embrittlement, can solve the problems of lack, direct data fitting method failure, complex basic control equations, etc., to achieve strong universality, reduce calculation difficulty, high precision Effect
Active Publication Date: 2021-03-19
ZHEJIANG UNIV
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Problems solved by technology
The desorption curve of hydrogen in the material lattice in the thermal desorption mass spectrometry of this type of material is highly coupled with the desorption curve of hydrogen in the trap, which cannot be decomposed by simple data processing methods
In addition, the basic governing equations governing the TDS process for hydrogen diffusion are complex, making direct data fitting methods ineffective
Therefore, there is still a lack of practical and high-precision measurement methods for the activation energy of hydrogen traps
Method used
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[0048] First of all, it needs to be explained that the present invention provides a method for measuring the activation energy of hydrogen traps in austenitic stainless steel. During the implementation of the present invention, expertise in the field of hydrogen embrittlement of materials will be involved. The applicant believes that, after carefully reading the application documents and accurately understanding the realization principle and purpose of the present invention, combined with the existing known technology, those skilled in the art can fully realize the present invention by using the knowledge of hydrogen embrittlement of materials they have mastered . Everything mentioned in the application documents of the present invention belongs to this category, and the applicant will not list them one by one.
[0049] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation examples.
[0050] ...
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Abstract
The present invention relates to the field of hydrogen embrittlement of materials and aims to provide a method for measuring hydrogen trap activation energy of austenitic stainless steel. The method comprises the following steps of: establishing an equilibrium state model for calculating hydrogen distribution and thermal desorption spectrum of a thin plate sample and a numerical calculation modelthereof; determining the applicable conditions of equilibrium state model for a certain austenitic stainless steel; carrying out hydrogen thermal desorption test of austenitic stainless steel and calculating the hydrogen trap binding energy and hydrogen trap activation energy by thermal desorption spectroscopy. The method provided by the invention has strong universality for measuring hydrogen trap activation energy of austenitic stainless steel. As the calculation formula is simplified by adopting the hydrogen pre-desorption method, the thermal desorption spectrum obtained by the hydrogen thermal desorption test can be effectively fitted, the calculation difficulty is greatly reduced, and the hydrogen trap activation energy measurement method of the austenitic stainless steel provided bythe invention has high accuracy.
Description
technical field [0001] The invention relates to the field of material hydrogen embrittlement, in particular to a method for measuring the activation energy of austenitic stainless steel hydrogen traps. Background technique [0002] Austenitic stainless steel is widely used in the manufacture of high-pressure hydrogen systems and their key components. However, with the increase in the pressure of high-pressure hydrogen systems and the complexity of service environments, the high-pressure hydrogen embrittlement of austenitic stainless steel has become a threat to high-pressure hydrogen storage containers. One of the important reasons for safety. Hydrogen atoms distributed in the metal segregate at defect sites and stress concentration areas within the metal, often referred to as hydrogen traps. The hydrogen atoms trapped in hydrogen traps play an important role in the occurrence of hydrogen embrittlement. Therefore, the measurement of hydrogen trap activation energy is an im...
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IPC IPC(8): G06F30/23G01N25/00G06F111/10G06F119/08
CPCG01N25/00G06F30/23
Inventor 郑津洋王栋亮花争立廖斌斌顾超华
Owner ZHEJIANG UNIV