Muitiscale modeling of irradiation induced hardening in a-Fe, Fe-Cr and Fe-Ni systems

Ioannis N. Mastorakos, Ngoc Le, Melody Zeine, Hussein M. Zbib, Moe Khaleel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
Pages259-264
Number of pages6
Volume1264
Publication statusPublished - 24 Dec 2010
Externally publishedYes
Event2010 MRS Spring Meeting - San Francisco, CA, United States
Duration: 5 Apr 20109 Apr 2010

Other

Other2010 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period5/4/109/4/10

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Mastorakos, I. N., Le, N., Zeine, M., Zbib, H. M., & Khaleel, M. (2010). Muitiscale modeling of irradiation induced hardening in a-Fe, Fe-Cr and Fe-Ni systems. In Materials Research Society Symposium Proceedings (Vol. 1264, pp. 259-264)