Laser-Driven Spall in Al: Velocity Interferometry and Target Recovery
Abstract
Using the HELEN laser at AWE we have done spall experiments on pure Al at strain rates between ∼6×105 and ∼2×106 s-1. A heterodyne velocity interferometer (Het-V) recorded rear-surface velocity profiles and the majority of targets were recovered. We have compared the behaviour of polycrystalline and single-crystal Al of four different crystal orientations. The preliminary results allow some correlation of pre-shot target structure—determined by electron backscatter diffraction—with the velocity profiles and recovered-target metallurgy.
- Publication:
-
Shock Compression of Condensed Matter 2009
- Pub Date:
- December 2009
- DOI:
- 10.1063/1.3295305
- Bibcode:
- 2009AIPC.1195..961R
- Keywords:
-
- fracture;
- high-pressure effects;
- shock waves;
- 46.50.+a;
- 62.50.-p;
- 47.40.Nm;
- Fracture mechanics fatigue and cracks;
- High-pressure effects in solids and liquids;
- Shock wave interactions and shock effects