2022-04-06 08:00:00
We explore the impact fragmentation of armor-grade boron carbide cylindrical targets using spherical tungsten carbide projectiles at impact velocities spanning from 100 to 550 m/s. In situ radiography of the target captures the target’s failure history under ballistic loading, while postmortem X-ray-computed tomography scans…
At the atomistic level, the dynamically deformed microstructure is characterized to identify structural modifications, such as dislocations, twins, and phase transformation. The advent of these deformation modes in the microstructure can severely affect its performance. Nonetheless, the anisotropy in physical properties or contribution to…
Experimental diagnostics and accompanying theory to analyze the results from homogeneous solids undergoing dynamic compression are well-placed, and significant advances have accrued from such studies. Less obvious is the case for heterogeneous materials systems, where the interaction lies between chemically and mechanically distinct species….
Diffraction techniques can powerfully and nondestructively probe materials while maintaining high resolution in both space and time. Unfortunately, these characterizations have been limited and sometimes even erroneous due to the difficulty of decoding the desired material information from features of the diffractograms. In this…
Characterizing the handling safety and sensitivity of explosives has been a challenging area of study for over 60 years. Historically one of the most accessible and widely utilized experiments has been the drop-weight impact test, which involves dropping a weight on a small sample…
Characterization of explosives is necessary to safely transport, store and design novel next-generation explosives. While computation models are being developed, empirical data is still required for accurate assessments, however most of the tests currently utilized are older, focusing on simple “go” or “no go”…
To elucidate the complex behavior and self-inconsistent results derived from shock recovery experiments, fine grained AMX602 magnesium alloy was shock compressed to stable Hugoniot stresses of approximately 2.0 GPa and 7.0 GPa, respectively along the plate normal and extrusion directions, then released back to…
Next generation advanced high strength steels employ a variety of deformation mechanisms, such as dislocation slip, twinning induced plasticity (TWIP), and transformation induced plasticity (TRIP), to achieve improved strength and ductility. For a given alloy, the active deformation mechanism is predicted in part by…
