A high-explosive driven experiment to compare the reflected Hugoniot and the release adiabat curves of Ti-6Al-4V alloy from a 52 GPa shock state

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


Page(s)		207 - 211
Section		Experimental Techniques
DOI		http://dx.doi.org/10.1051/dymat/2009028
Published online		15 September 2009

DYMAT 2009 (2009) 207-211
DOI: 10.1051/dymat/2009028

A high-explosive driven experiment to compare the reflected Hugoniot and the release adiabat curves of Ti-6Al-4V alloy from a 52 GPa shock state

A. Sollier¹, V. Bouyer², J.-B. Maillet¹ and C. Voltz³

¹ CEA, DAM, DIF, 91297 Arpajon, France
² CEA, DAM, LE RIPAULT, 37260 Monts, France
³ CEA, DAM, VALDUC, 21120 Is-sur-Tille, France

Published online: 15 September 2009

Abstract
An experiment has been performed with an explosive device in order to compare the reflected shock Hugoniot and the release adiabat curve of Ti-6Al-4V alloy from a 52 GPa shock state. For this purpose, impedance matching method and progressive acceleration of free surface technics associated with electronic chronometry and simultaneous DLI and VISAR interferometry are used. We find that the release adiabat curve first lies below the reflected Hugoniot in the (P, u) plane, then crosses it around 20 GPa, and finally lies above it for lower pressures. An analysis based on the effects of material strength on the release adiabat is proposed to explain these results.

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