Symposium I-C:

Defects and Microstructural Processes in Materials Under Irradiation


Symposium Organizers:

Y. Zhang, Idaho National Laboratory
A. Aitkaliyeva, University of Florida
Y. Yang, University of Florida
X.D. Bai, Virginia Tech

Symposium Description:

Radiation by high-energy particles such as neutrons and ions modifies the microstructure and changes properties of materials. For instance, irradiation produces lattice defects in the forms of vacancy and interstitial types, which further agglomerate into extended defects such as voids and loops. These extended defects interact with dislocations and can cause hardening and embrittlement. Fundamental understanding of defect physics, microstructural evolution and consequent changes in properties is crucial for mitigating property degradation in nuclear materials and fuels, and for tailoring materials properties using various irradiation methods. This symposium summarizes recent progresses in this field. Efforts directed to study defect production and accumulation, microstructural and compositional evolution, and microstructure-property correlations are of interested. Development of multiscale modeling and simulation methods and experimental characterization capabilities is also welcome. Studies that investigate, but are not limited to, the following areas are solicited:

  • Thermodynamics and kinetics of defects
  • Radiation induced microstructural and compositional evolution, and dimensional changes (e.g., swelling, growth and creep)
  • Structure-property correlations and property degradation under irradiation (e.g., hardening and embrittlement)
  • Development of multiscale modeling and experimental characterization capabilities
  • Advanced materials with improved irradiation behavior (e.g., irradiation resistant materials, advanced fuels)