| Autor: |
J. Chêne, M. Wery, L. Moli-Sanchez, E. Leunis, F. Martin |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Defect and Diffusion Forum. :485-490 |
| ISSN: |
1662-9507 |
| DOI: |
10.4028/www.scientific.net/ddf.323-325.485 |
| Popis: |
The electrochemical permeation technique was used to evaluate the effect of the microstructure on hydrogen diffusivity and hydrogen trapping at room temperature in martensitic steels. A detailed study of the electrochemical permeation technique was first performed in order to identify the boundary conditions of a permeation test in the selected experimental set-up. The validity of the apparent diffusion coefficient derived from this test is also discussed. A 34CrMo4 quenched steel has been selected and designed at three tempering temperatures (200°C, 540°C and 680°C) in order to obtain three different microstructures. According to permeation measurements, H diffusion strongly depends on the microstructure. The material tempered at 540°C exhibits the smallest diffusion coefficient and the largest fraction of reversible traps at room temperature. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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