Effect of Carrier Gas and Heat Treatment on the Dynamic Behavior of Cold Sprayed Aluminum Coatings

Cold spray has emerged as an attractive additive manufacturing technique with its capability of processing fine-grained, strongly bonded deposits. Application of conventional techniques restrict a comprehensive understanding of the mechanical behavior of these materials and hence advancement of this technology. This paper delineates the role of air and helium carrier gases and post-spray stress relaxation on the dynamic complex moduli of cold sprayed aluminum deposits as a function of oscillation frequency and temperature. Insights on the interplay between local inter-splat mechanics and bulk mechanical behavior obtained from this investigation constitutes a major development in cold spray and surface engineering