INVESTIGADORES
BRINGA Eduardo Marcial
artículos
Título:
Laser shocking of materials: Toward the national ignition facility
Autor/es:
M.A. MEYERS; B.A. REMINGTON; B. MADDOX; E.M. BRINGA
Revista:
JOM (1989)
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2010 vol. 62 p. 24 - 30
ISSN:
1047-4838
Resumen:
In recent years a powerful experimental tool has been added to the
arsenal at the disposal of the materials scientist investigating
materials response at extreme regimes of strain rates,
temperatures, and pressures: laser compression. This technique has
been applied successfully to mono-, poly-, and nanocrystalline
metals and the results have been compared with predictions
from analytical models and molecular dynamics simulations.
Special flash x-ray radiography and flash x-ray diffraction, combined
with laser shock propagation, are yielding the strength of
metals at strain rates on the order of 107108 s−1
and resolving details of the kinetics of phase transitions. A puzzling
result is that experiments, analysis, and simulations
predict dislocation densities that are off by orders of
magnitude. Other surprises undoubtedly await us as we explore even
higher pressure/strain rate/temperature regimes enabled by the
National Ignition Facility.