INVESTIGADORES
BRINGA Eduardo Marcial
artículos
Título:
Metals far from equilibrium: From shocks to radiation damage
Autor/es:
E.M. BRINGA; B.D. WIRTH; M.J.CATURLA; J. STÖLKEN; D. KALANTAR
Revista:
NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH B - BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2003 vol. 202 p. 56 - 63
ISSN:
0168-583X
Resumen:
Shock waves and high-energy particle radiation can each drive materials
far from thermodynamic equilibrium and enable novel scenarios in the
processing of materials. A large number of theoretical and experimental
studies of shock deformation have been performed on polycrystalline
materials, but shock deformation in single crystals has only recently
been studied in some detail. We present molecular dynamics (MD)
simulations of the shock response of single crystal copper, modeled
using an embedded atom potential that reproduces both defect formation
and high pressure behavior. Shock-induced plasticity will also be
discussed. Predicting the in-service response of ferritic alloys in
future fusion energy environments requires a detailed understanding of
the mechanisms of defect accumulation and microstructure evolution in
harsh radiation environments, which include a high level of He
generation concurrent with primary damage production. The second half of
this paper describes results of atomistic MD and kinetic Monte Carlo
simulations to investigate the role of He on point defect cluster
behaviour and damage accumulation in bcc Fe. The goal of these
simulations is to study the mechanisms responsible for the formation of
vacancy-He clusters which serve as He bubble and void nuclei in fusion
reactor materials.