Hydrogen Concentration Distribution in 2.25Cr-1Mo-0.25V Steel under the Electrochemical Hydrogen Charging and Its Influence on the Mechanical Properties
| Autor: | Jianjun Chen, Haiting Zhou, Changdong Yin, Dongdong Ye, Jiahao Ge, Zhou Xu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen chemistry.chemical_element Electrochemistry lcsh:Technology Indentation hardness Article Metal ABAQUS simulation Fracture toughness General Materials Science Composite material lcsh:Microscopy mechanical properties evaluation lcsh:QC120-168.85 Tensile testing lcsh:QH201-278.5 lcsh:T Microstructure chemistry lcsh:TA1-2040 visual_art visual_art.visual_art_medium lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering galvanostatic hydrogen charging diffusible hydrogen content lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 electrochemical hydrogen permeation Hydrogen embrittlement |
| Zdroj: | Materials Volume 13 Issue 10 Materials, Vol 13, Iss 2263, p 2263 (2020) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma13102263 |
| Popis: | 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&rsquo 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. |
| Databáze: | OpenAIRE |
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