About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Accelerated Discovery and Qualification of Nuclear Materials for Energy Applications
|
Presentation Title |
Effect of Distributed Gas Bubbles on Elastic-plastic Deformation Behavior in Polycrystalline UMo |
Author(s) |
Shenyang Hu, Benjamin W Beeler, Douglas E Burkes |
On-Site Speaker (Planned) |
Shenyang Hu |
Abstract Scope |
The macroscale fuel performance model requires constitutive equations that describe elastic-plastic properties, swelling and creep rates as a function of fission conditions and fuel microstructures. In this work, we leverage the existing computational capability of gas bubble evolution, radiation defect accumulation and elastic-plastic deformation to develop a physics-based model of deformation in irradiated UMo fuels. The crystal plasticity theory is used to describe the inhomogeneous and anisotropic deformation in the polycrystalline UMo with distributed gas bubbles. Based on simulations and experiments, a set of gas bubble structures of different size, density and internal pressure were constructed. The effect of gas bubble structure on elastic-plastic deformation under different stresses were simulated. The constitutive equation of elastic-plastic deformation used in fuel performance modeling in literature was assessed by comparing the predicted elastic-plastic properties. The extension of the model to simulate creep deformation will be discussed in the talk. |
Proceedings Inclusion? |
Planned: |