Skip to main content Accessibility help
×
Home

Multiscale Modeling of Irradiation Induced Hardening in a-Fe, Fe-Cr and Fe-Ni Systems

  • Ioannis Mastorakos (a1), Ngoc Le (a2), Melody Zeine (a3), Hussein M Zbib (a4) and Moe Khaleel (a5)...

Abstract

Structural materials in the new Generation IV reactors will operate in harsh radiation conditions coupled with high levels of hydrogen and helium production, thus experiencing severe degradation of mechanical properties. The development of structural materials for use in such a hostile environment is predicated on understanding the underlying physical mechanisms responsible for microstructural evolution along with corresponding dimensional instabilities and mechanical property changes. As the phenomena involved are very complex and span in several length scales, a multiscale approach is necessary in order to fully understand the degradation of materials in irradiated environments. The purpose of this work is to study the behavior of Fe systems (namely a-Fe, Fe-Cr and Fe-Ni) under irradiation using both Molecular Dynamics (MD) and Dislocation Dynamics (DD) simulations. Critical information is passed from the atomistic (MD) to the microscopic scale (DD) in order to study the degradation of the material under examination. In particular, information pertaining to the dislocation-defects (such as voids, helium bubbles and prismatic loops) interactions is obtained from MD simulations. Then this information is used by DD to simulate large systems with high dislocation and defect densities.

Copyright

References

Hide All
1 Odette, G.R. Modeling Microstructural Evolution in Fusion-Reactor Environments. Journal of Nuclear Materials, 133, 127 (1985).
2 Spatig, P. et al. , Plastic flow properties and fracture toughness characterization of unirradiated and irradiated tempered martensitic steels. J. Nuc. Mater., 367370, 527 (2007).
3http://lammps.sandia.gov/
4 Mendelev, M.I. et al. , Development of new interatomic potentials appropriate for crystalline and liquid iron, Phil. Mag. 83, 3977 (2003); G. Bonny et al., Fe-Ni many-body potential for metallurgical applications, Modelling Simul. Mater. Sci. Eng. 17, 025010 (2009).
5 Hirth, J.p. and Lothe, J. J., Theory of dislocations, Krieger Publ. Company, Malabar, 1982
6 Zbib, H.M. and Rubia, T. Diaz de la, A multiscale model of plasticity, Int. J. Plasticity, 18, 1133 (2002).
7 Rhee, M. et al. , A Superdislocation Model for the Strengthening of Metal Matrix Composites and the Initiation and Propagation of Shear Bands, Acta Met. Mat., 42, 2645 (1994).

Keywords

Related content

Powered by UNSILO

Multiscale Modeling of Irradiation Induced Hardening in a-Fe, Fe-Cr and Fe-Ni Systems

  • Ioannis Mastorakos (a1), Ngoc Le (a2), Melody Zeine (a3), Hussein M Zbib (a4) and Moe Khaleel (a5)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.