| Abstract Scope |
In cold spray research, laser-induced particle impact testing (LIPIT) has been widely used to study high-velocity impacts of single particles. Yet, to understand coating formation and e.g., the origins of flaws, the collective and sequential impacts of multiple microparticles must be considered. In this talk, we report the accumulation of many particles into particle stacks using LIPIT. These experiments provide a bridge between the almost ideal single-particle results and the uncharacterised multitudes of particles in a true coating, and also introduce a new element of stochasticity into LIPIT research. We present a statistical approach to analyse such randomised particle accumulations and provide some first statistical connections between, e.g., impact velocity and porosity, or impact velocity and recrystallization. Thus, we validate a many-particle testing mode of LIPIT which we believe has great potential for the future study of a wide range of many-particle problems. |