Dynamic Behaviour of Single Crystalline Silver Microcubes

Abstract eng:
We present the high-velocity impact response of nanoscale face centred cubic metals, using defect-free single crystalline silver microcubes as model materials. A laser induced projectile impact test (LIPIT) apparatus accelerates the microcubes as projectiles at velocities between 300 and 1000 ms'l, and the microcubes directly impact a rigid target along different crystal symmetry directions. We use scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques to characterize the dynamic deformation mechanisms. We explore the deformation textures resulting from different impact directions, and aim to develop a fundamental understanding of how the crystal structure of single crystalline nanoscale metals evolves due to extreme strain-gradient and strain-rate.

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