About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Materials Science and Engineering of Materials in Nuclear Reactors
|
Presentation Title |
Modeling of Interface Evolution during Zirconium Alloy Corrosion |
Author(s) |
Natalia Tymiak Carlson, Richard W. Smith, Bruce F. Kammenzind |
On-Site Speaker (Planned) |
Natalia Tymiak Carlson |
Abstract Scope |
A fundamental description of the evolution of the metal/oxide interface is central to the development of a mechanistic model of zirconium alloy corrosion. Despite continuing advances in the characterization of oxide films produced under various oxidation conditions, an understanding of whether observed cracks, grain boundary porosity, and chemical segregation either result from or facilitate the growth process is still lacking. Corrosion models focus almost exclusively on phenomena affecting charge carrier transport. Attention has to be paid to the structural rearrangements and chemical reactions at the moving interface if a self-consistent picture of the evolving structure/phase/stress/stoichiometrty, and oxidation rate is the ultimate goal. A synergy of atomistic and continuum scale models is utilized to evaluate the impact of interlinked stress, stoichiometry, phase content, impurities, and structural defects of zirconium oxide at the metal/oxide interface on the local oxidation rates and evolving interface topography. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |