|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Computational Methods and Experimental Approaches for Uncertainty Quantification and Propagation, Model Validation, and Stochastic Predictions
||B-7: Numerical Simulation of the Mechanical Behavior of Zr-Nb Alloys over a Wide Range of Strain Rates
||Evgeniya Skripnyak, Natalia Skripnyak, Vladimir Skripnyak
|On-Site Speaker (Planned)
Multi-scale computational model was used for the investigation of deformation and fracture of close packed hexagonal (HCP) alloys under stress pulse loadings. The model takes into consideration the distribution of grain sizes, average size and concentration of precipitates. Model describes the shear stress relaxation under tension and compression at the homologous temperature below 0.5. The numerical results on dynamic and quasi-static deformation of Zr−1 vol. % Nb alloy are good agreed with experimental data. Strain rate sensitivity of the yield stress of Zr-Nb alloys at fixed temperature depends on Nb concentration, and grain size distribution. It is shown that Zr-Nb alloys exhibit significant difference in the resistance to plastic deformation under compression and tension at high strain rates. It was predicted the spall strength of Zr−Nb alloys with precipitation strengthening is higher in comparison of Zr.