Evaluation of a hybrid cold-spray and machining method for fabrication of parts with high surface integrity
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Abstract
Cold-spray technology has been proven to have various engineering and manufacturing applications, including the capability to restore previously unrepairable parts. However, like most additively manufactured parts, it will likely require post-processing, such as machining, to improve surface finish and dimensional accuracy. In addition, cold-spray deposits typically possess a significant amount of porosity in their as-fabricated state compared to conventionally manufactured, cast-wrought counterparts. Consequently, this can be detrimental to the mechanical performance of the component, particularly fatigue life. This thesis presents a systematic evaluation of the influence of negative rake-angle on the subsurface porosity via finite element analysis (FEA) and experimental analysis. The optimized process parameters can be utilized to tailor a unique set of hybrid processes to be implemented on cold-spray materials. The results from the simulation and experimental results are discussed and analyzed.

