文献类型：期刊文献

英文题名：Hydrogen Concentration Distribution in 2.25Cr-1Mo-0.25V Steel under the Electrochemical Hydrogen Charging and Its Influence on the Mechanical Properties

作者：Yin, Changdong[1];Chen, Jianjun[1];Ye, Dongdong[1];Xu, Zhou[1];Ge, Jiahao[1];Zhou, Haiting[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]China Jiliang Univ, Dept Qual & Safety Engn, Hangzhou 310018, Peoples R China

年份：2020

卷号：13

期号：10

外文期刊名：MATERIALS

收录：;EI(收录号：20202208742493);WOS:【SCI-EXPANDED(收录号:WOS:000539277000055)】；

基金：This work was supported by the National Basic Research Program of China (Project No. 2015CB057602).

语种：英文

外文关键词：electrochemical hydrogen permeation; galvanostatic hydrogen charging; diffusible hydrogen content; mechanical properties evaluation; ABAQUS simulation

摘要：The deterioration of the mechanical properties of metal induced by hydrogen absorption threatens the safety of the equipment serviced in hydrogen environments. In this study, the hydrogen concentration distribution in 2.25Cr-1Mo-0.25V steel after hydrogen charging was analyzed following the hydrogen permeation and diffusion model. The diffusible hydrogen content in the 1-mm-thick specimen and its influence on the mechanical properties of the material were investigated by glycerol gas collecting test, static hydrogen charging tensile test, scanning electron microscopy (SEM) test, and microhardness test. The results indicate that the content of diffusible hydrogen tends to be the saturation state when the hydrogen charging time reaches 48 h. The simulation results suggest that the hydrogen concentration distribution can be effectively simulated by ABAQUS and the method can be used to analyze the hydrogen concentration in the material with complex structures or containing multiple microstructures. The influence of hydrogen on the mechanical properties is that the elongation of this material is reduced and the diffusible hydrogen will cause a decrease in the fracture toughness of the material, and thus hydrogen embrittlement (HE) will occur. Moreover, the Young's modulus E and microhardness are increased due to hydrogen absorption, and the variation value is related to the hydrogen concentration introduced into the specimen.