About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Tackling Structural Materials Challenges for Advanced Nuclear Reactors
|
Presentation Title |
Microplasticity of Irradiated Inhomogeneous Alloys |
Author(s) |
Anter A. El-Azab, Yash Pachaury |
On-Site Speaker (Planned) |
Yash Pachaury |
Abstract Scope |
We report on a preliminary effort to understand interaction between alloy microplasticity and compositional inhomogeneity from a dislocation dynamics perspective. We tackle this problem by a multiscale simulation in three steps: (1) Analysis of the 3D composition morphology in alloys with tendency to undergo spinodal instability both thermally and under irradiation, with bcc FeCrAl alloys as a model system, (2) atomistic simulation of the dislocation mobility as a function of the local composition, and (3) using dislocation dynamics simulations to understand the impact of composition inhomogeneity and coherency strain on microplasticity. In this presentation, we give a quantitative analysis of the dislocation microstructure differences among the inhomogeneous and homogeneous alloys and the dependence of alloy strength on the wavelength and amplitude of the alloy composition fluctuations. |