Effect of periodic temperature variations on the microstructure of neutron-irradiated metals
| Autor: | Takeo Muroga, Naoyuki Hashimoto, A.L. Qualls, Bachu Narain Singh, David T. Hoelzer, Steven J. Zinkle |
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| Rok vydání: | 2002 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Metallurgy Alloy chemistry.chemical_element engineering.material Microstructure Copper Nuclear Energy and Engineering chemistry engineering General Materials Science Neutron Irradiation Austenitic stainless steel Composite material Dislocation Stacking fault |
| Zdroj: | Journal of Nuclear Materials. :192-196 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/s0022-3115(02)01137-6 |
| Popis: | Specimens of pure copper, a high purity austenitic stainless steel, and V–4Cr–4Ti were exposed to eight cycles of either constant temperature or periodic temperature variations during neutron irradiation in the High Flux Isotopes Reactor to a cumulative damage level of 4–5 displacements per atom. Specimens exposed to periodic temperature variations experienced a low temperature (360 °C) during the initial 10% of accrued dose in each of the eight cycles, and a higher temperature (520 °C) during the remaining 90% of accrued dose in each cycle. The microstructures of the irradiated stainless steel and V–4Cr–4Ti were qualitatively similar to companion specimens that were continuously maintained at 520 °C during the entire irradiation. The microstructural observations on pure copper irradiated at a constant temperature of 340 °C in this experiment are also summarized. The main radiation-induced microstructural features consisted of dislocation loops, stacking fault tetrahedra and voids in the stainless steel, Ti-rich precipitates in the V alloy, and voids (along with a low density of stacking fault tetrahedra) in copper. |
| Databáze: | OpenAIRE |
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