Table 2.

Calculated values of rate of evolution of void fraction for the various strain rate (s⁻¹) using a velocity of 1 km/s and varying pulse durations for the piston for the various polycrystalline Al microstructures.

Grain Size (nm)	Strain Rate, $\dot{\epsilon }$ (s−1)	Void Growth rate, ${\dot{V}}_f$ (ps−1)
50 (MD)	7.17 × 109	0.0075
100 (L2)	3.46 × 109	0.0034
200 (L4)	1.74 × 109	0.0017
400 (L8)	8.17 × 108	0.00089
800 (L16)	4.43 × 108	0.00051
3200 (L64)	1.15 × 108	0.00014