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| Content Provider | Springer Nature Link |
|---|---|
| Author | Nykyforchyn, H. M. Skrypnyk, I. D. Didukh, P. M. |
| Copyright Year | 1999 |
| Abstract | We present an estimate of the partial pressure of methane in microvoids under the conditions of hydrogen corrosion in 2.25Cr-1Mo steel. On the basis of the thermodynamic analysis of a two-phase (metalmicrovoid) system containing hydrogen and Me$_{3}$C, Me$_{7}$C$_{3}$, and Me$_{23}$C$_{6}$-type carbides as thermodynamic components, we suggest a new scheme for the evaluation of the partial pressure of methane in the microvoids of the metal. We give an example of the evaluation of the pressure of methane in internal cavities in steel at a temperature of 500°C for a simplified case where the formation of methane is controlled by the amount of carbon formed as a result of the decomposition of carbides. Unlike the previous computational schemes, in the proposed scheme, pressure depends on the radius of the microvoid. In the general case, this approach also takes into account the distance between the analyzed layer and the metal surface, the width of the decarbonized zone, the rates of carbon and hydrogen diffusion in the metal, and many other parameters. |
| Starting Page | 512 |
| Ending Page | 520 |
| Page Count | 9 |
| File Format | |
| ISSN | 1068820X |
| Journal | Materials Science |
| Volume Number | 34 |
| Issue Number | 4 |
| e-ISSN | 1573885X |
| Language | English |
| Publisher | Kluwer Academic Publishers-Plenum Publishers |
| Publisher Date | 1999-01-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Materials Science Structural Materials Characterization and Evaluation Materials Structural Mechanics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Mechanics of Materials Condensed Matter Physics Materials Science Mechanical Engineering |
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