Volume 1, 2009DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
|89 - 94
|15 September 2009
Influence of shockwave profile on ejection of micron-scale material from shocked Sn surfaces: An experimental studyM.B. Zellner, M. Byers, G. Dimonte, J.E. Hammerberg, T.C. Germann, P.A. Rigg and W.T. Buttler
Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545, USA
Published online: 15 September 2009
This effort experimentally investigates the relationship between shock-breakout pressurea and the amount of micron-scale fragments ejected (ejecta) upon shock release at the metal/vacuum interface of Sn targets shocked with a supported shockwave. The results are compared with an analogous set derived from HE shocked Sn targets, Taylor shockwave loading. The supported shock-pulse was created by impacting a Sn target with a Ti64b impactor that was accelerated using a powder gun. Ejecta production at the free-surface or back-side of the Sn targets were characterized through use of piezoelectric pins and Asay foils, and heterodyne velocimetry verified the time of shock release and the breakout pressure.
a Shock-breakout pressure is defined as the peak internal longitudinal material pressure just prior to shock release at the material free-surface.
b Ti64 (Ti-6Al-4V) is a titanium alloy with 6 weight percent aluminum and 4 weight percent vanadium.
© EDP Sciences 2009