| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
|
| Presentation Title |
Radiation-Induced Segregation in Binary Alloy Systems Examined Via Phase Field Simulations |
| Author(s) |
Daniel Enrique Vizoso, Chaitanya Deo, Remi Dingreville |
| On-Site Speaker (Planned) |
Daniel Enrique Vizoso |
| Abstract Scope |
Materials exposed to a radiation environment experience microstructural changes due to the local atomic shuffling and defect formation. One evolutionary mechanism occurring in such environment in metallic alloys is radiation-induced segregation (RIS), where atomic mixing and radiation-enhanced diffusion can disrupt the random order of a miscible alloy and induce segregation or depletion of solutes. These processes occur over a wide range of time- and length-scales, which makes modeling RIS via conventional atomistic methods computationally challenging. In this presentation, we discuss a mesoscale phase-field model for RIS in binary alloys motivated by atomistic results that includes the consideration of irradiation conditions (electron vs. ion irradiation; flux), dislocations as sinks, and the formation and growth of defect clusters. We illustrate our results on an exemplar binary alloy and discuss their dependence on dose rate, defect sinks, and the damage mechanism. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, Other |