Dose rate dependence of Cr precipitation in an ion-irradiated Fe 18Cr alloy
| Autor: | G. Robert Odette, N. Almirall, Elaina R. Reese, Scott J. Tumey, Emmanuelle A. Marquis, Takuya Yamamoto |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Diffusion Alloy Analytical chemistry 02 engineering and technology Atom probe engineering.material 01 natural sciences Ion law.invention law 0103 physical sciences General Materials Science Irradiation 010302 applied physics Precipitation (chemistry) Mechanical Engineering technology industry and agriculture Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Mechanics of Materials engineering 0210 nano-technology Dose rate |
| Zdroj: | Scripta Materialia. 146:213-217 |
| ISSN: | 1359-6462 |
| Popis: | Precipitation of α′ in Fe Cr alloys under neutron irradiation is thermodynamically driven while being accelerated by radiation-enhanced diffusion. However, similar alloys under ion irradiation at high dose rates (> 10− 4 dpa/s) fail to exhibit α′ precipitation. Here, the microstructure of an Fe 18Cr alloy under ion or neutron-irradiation at 300 °C at dose rates from ~ 10− 7 to 10− 4 dpa/s was analyzed by atom probe tomography. The steady-state composition content of the clusters depends on the ion irradiation dose and dose rate, confirming the contribution of ballistic mixing in diluting the Cr concentration in non-equilibrium α′ precipitates. |
| Databáze: | OpenAIRE |
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