Understanding Complex Damage Mechanisms and Jetting Phenomena of Additively Manufactured Ti-5553 Lattices under Extreme Shock Environments

Additively manufactured (AM) lattices are built via laser powder bed fusion (LPBF) utilizing 3D mm-scale complex, ordered, and long-range periodic computer aided designs. These designs combined with metallic construction materials give AM lattices a high tailorability and strength-to-weight ratios; attributes which are desirable for industries that require special-made parts that functionally experience high strain rates (such as defense, aerospace, and biomedicine sectors). Here, we will discuss novel damage mechanisms and phenomena of Ti-5Al-5V-5Mo-3Cr (Ti-5553) octet-truss and gyroid lattices under impact and blast conditions. In-situ x-ray imaging and post-mortem microstructural characterizations will be shared and compared to predicted behaviors seen in detailed hydrodynamic simulations, such as jetting and spallation in adjacent material.
LLNL-ABS-858781. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.