About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Defects and Interfaces: Modeling and Experiments
|
Presentation Title |
Finite-deformation Sharp Interface Model for Void Evolution Under Irradiation |
Author(s) |
Sreekar Rayaprolu, Kyle Starkey, Anter El-Azab |
On-Site Speaker (Planned) |
Sreekar Rayaprolu |
Abstract Scope |
Crystalline materials subjected to irradiation in nuclear reactors can develop voids. We formulated a thermodynamically consistent sharp interface theory for void evolution under irradiation, which includes vacancy and interstitial dynamics coupled with finite deformation mechanics. We include energy and entropy fluxes due to point-defect diffusion in the balance laws, which are neglected in other similar models. We explicitly account for the anisotropic interfacial energy, interfacial stresses and eigenstrain associated with vacancies and self-interstitials using the multiplicative decomposition of deformation gradient. We developed the driving forces for the interface motion and point-defect fluxes in the reference configuration, along with the defect reaction rates at the void interface, which depend on Eshelby stress tensors associated with the bulk and surface. We will elaborate on these driving forces and the void evolution under hydrostatic stress states, including the relevant material parameters. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, Other |