Crystal plasticity modeling of irradiation growth in Zircaloy-2
| Autor: | S.I. Golubov, Carlos N. Tomé, Anirban Patra |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Zirconium Number density Materials science Zirconium alloy Thermodynamics chemistry.chemical_element 02 engineering and technology Intergranular corrosion 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Grain size Condensed Matter::Materials Science Crystallography Creep chemistry 0103 physical sciences Irradiation Crystallite 0210 nano-technology |
| Zdroj: | Philosophical Magazine. 97:2018-2051 |
| ISSN: | 1478-6443 1478-6435 |
| DOI: | 10.1080/14786435.2017.1324648 |
| Popis: | A physically based reaction-diffusion model is implemented in the visco-plastic self-consistent (VPSC) crystal plasticity framework to simulate irradiation growth in hcp Zr and its alloys. The reaction-diffusion model accounts for the defects produced by the cascade of displaced atoms, their diffusion to lattice sinks and the contribution to crystallographic strain at the level of single crystals. The VPSC framework accounts for intergranular interactions and irradiation creep, and calculates the strain in the polycrystalline ensemble. A novel scheme is proposed to model the simultaneous evolution of both, number density and radius, of irradiation-induced dislocation loops directly from experimental data of dislocation density evolution during irradiation. This framework is used to predict the irradiation growth behaviour of cold-worked Zircaloy-2 and trends compared to available experimental data. The role of internal stresses in inducing irradiation creep is discussed. Effects of grain size, tex... |
| Databáze: | OpenAIRE |
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