Evaluation of Strain Field Around Impacted Particles by Applying Electron Moiré Method.

Recently, the thermal-spray community has focused considerable attention on cold-spray and warm-spray techniques, in which the temperatures of sprayed particles are kept below their melting point and adhesion occurs based on the impact phenomenon between a solid particle and a substrate. The mechanisms of adhesion are still unclear, but the degree of the mechanical deformation at the interface is considered to be a key factor influencing this mechanism. However, it is very difficult to directly measure the strain at the interface. Instead, in this work, the strain fields on a substrate around an impacted particle sprayed by warm-spray deposition were measured by applying electron Moiré method, and compared with numerical simulation results. [ABSTRACT FROM AUTHOR]