Microstructural features informing continuum scale dynamic behavior of an additively manufactured titanium alloy

The connection between process-structure-properties-performance (PSPP) is an overarching goal in materials design. Increasingly complex and integrated physics models attempt to predict the entire path of a material from processing all the way through performance. The advent of additive manufacturing (AM) has increased the range but also uncertainty in nearly all aspects of PSPP which can be viewed as both a challenge and an opportunity. We will present an effort to incorporate processing, structure, and properties effects on the dynamic performance of a dual-phase titanium alloy produced through AM. Specifically we will focus on equation-of-state, strength, and damage models to understand and incorporate microstructure information to predict HEL, Hugoniot, and spall response of our titanium alloy. Added wrinkles to this include porosity from AM processing, phase fraction, interfacial strength, and effect of heat affected zones, to name a few. Attempts to incorporate all of these microstructural characteristics into modeling of dynamic performance within established continuum frameworks will be discussed and where this approach might break down. Time permitting, we discuss efforts to model the dynamic performance explicitly from the grain scale up.