Figure 4 | Scientific Reports

Figure 4

From: The Quasi-Coarse-Grained Dynamics Method to Unravel the Mesoscale Evolution of Defects/Damage during Shock Loading and Spall Failure of Polycrystalline Al Microstructures

Figure 4

The plots for the evolution of pressure during spall failure of 400 nm grain sized polycrystalline Al system predicted by L8-QCGD simulation for a velocity of 1 km/s for the piston and pulse duration of 50 ps and 100 ps are shown in (a) and (b), respectively. The comparison of the evolution of perfect dislocations and Shockley partials for the two simulations is shown in (c) and the corresponding evolution of void fraction is shown in (d). The variations in the failure behavior is observed in the snapshots showing the microstructure for the system in (e) for the 50 ps pulse duration, and in (f) for the 100 ps pulse duration, at a time of 400 ps. The coloring of the atoms is used to identify defects, surface and stacking sequences using a combination of CNA and CSP values. The FCC stacked atoms are colored green, HCP stacked atoms are colored yellow, surface atoms are colored red and the disordered atoms are colored blue.

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