INVESTIGADORES
BRINGA Eduardo Marcial
congresos y reuniones científicas
Título:
INVITED: Plasticity induced by pre-existing defects during high strain-rate loading
Autor/es:
E.M. BRINGA
Lugar:
Denver
Reunión:
Congreso; APS March meeting 2014; 2014
Institución organizadora:
APS
Resumen:
http://meetings.aps.org/Meeting/MAR14/Session/L26.1High strain-rate deformation of metals has
been typically studied for perfect monocrystals. Computational advances
now allow more realistic simulations of materials including defects,
which lower the Hugoniot Elastic Limit, and lead to microstructures
differing from the ones from perfect monocrystals. As pre-existing
defects one can consider vacancy clusters, dislocation loops, grain
boundaries, etc. New analysis tools allow analysis of dislocation
densities and twin fractions, for both f.c.c. and b.c.c. metals. Recent
results for defective single crystal Ta [Tramontina et al.., High Energy
Den. Phys. 10, 9 (2014), and Ruestes et al., Scripta Mat. 68, 818
(2013)], and for polycrystalline b.c.c metals [Tang et al., Mat. Sci.
Eng. A 580, 414 (2013), and Gunkelmann et al., Phys. Rev. B 86, 144111
(2012)] will be highlighted, alongside new results for nanocrystalline
Cu, Ta, Fe, and Zr [Ruestes et al., Scripta Mat. 71, 9 (2014)].
This work has been carried out in collaboration with D. Tramontina, C.
Ruestes, E. Millan, J. Rodriguez-Nieva, M.A. Meyers, Y. Tang, H.
Urbassek, N. Gunkelmann, A. Stukowski, M. Ruda, G. Bertolino, D. Farkas,
A. Caro, J. Hawreliak, B. Remington, R. Rudd, P. Erhart, R. Ravelo, T.
Germann, N. Park, M. Suggit, S. Michalik, A. Higginbotham and J. Wark.