Role of stacking fault energy (SFE) on the high strain rate deformation of cold sprayed Cu and Cu–Al alloy coatings

Cold spray deposition involves a unique combination of high strain rate and moderate to high strain deformation of powder particles that contrasts it from conventional severe plastic deformation techniques. In the present work, a systematic study of the microstructure and micromechanical properties of cold sprayed Cu and Cu–Al alloys, which are known for significant variation in stacking fault energy with small alloying addition, is presented. The deposition process results in significant grain refinement (