Effect of statistically stored dislocations in tungsten on the irradiation induced nano-hardening analyzed by different methods
| Autor: | Marie Loyer-Prost, Chao Yin, N. Castin, D. Terentyev, Andrii Dubinko, Alexander Bakaev, A. Bakaeva, G. Bonny, C. Cabet, Tymofii Khvan |
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| Rok vydání: | 2021 |
| Předmět: |
Nuclear and High Energy Physics
Materials science chemistry.chemical_element 02 engineering and technology Nanoindentation Tungsten 021001 nanoscience & nanotechnology 01 natural sciences 010305 fluids & plasmas Nuclear Energy and Engineering chemistry Indentation 0103 physical sciences Hardening (metallurgy) General Materials Science Irradiation Dislocation Composite material Pinning points 0210 nano-technology Radiation hardening |
| Zdroj: | Journal of Nuclear Materials |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2020.152543 |
| Popis: | Tungsten self-ion irradiation was performed at 800 °C up to 0.01-1 dpa on two different W grades with essentially different dislocation density. Nanoindentation was applied to characterize the radiation hardening in two W grades with different microstructure. Different methods to analyze the indentation curves were applied to extract the bulk equivalent radiation hardening. It was shown that depending on the applied method, different outcomes may occur. The most satisfactory procedure was established and a consistent set of parameters was found. The bulk equivalent radiation hardening was found to saturate above 0.1 dpa. The characteristic distance between irradiation induced defects acting as dislocation pinning points was found to decrease up to 0.1 dpa, and then saturate/increase with irradiation dose. No essential difference in radiation hardening was observed between the studied W grades with essentially different initial dislocation density. |
| Databáze: | OpenAIRE |
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