Influence of shockwave profile on ejection of micron-scale material from shocked Sn surfaces: An experimental study

Issue		DYMAT 2009 Volume 1, 2009 DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading


Page(s)		89 - 94
Section		Experimental Techniques
DOI		http://dx.doi.org/10.1051/dymat/2009012
Published online		15 September 2009

DYMAT 2009 (2009) 89-94
DOI: 10.1051/dymat/2009012

Influence of shockwave profile on ejection of micron-scale material from shocked Sn surfaces: An experimental study

M.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

Abstract
This effort experimentally investigates the relationship between shock-breakout pressure^a 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 Ti64^b 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.

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