Influence of Carrier Gas and Post-Heat Treatment on the Microstructure and Tensile Properties of 3D-Printed Cold Spray Copper

Abstract This study examines the effects of N2 and He process gases and heat treatment on the microstructure and mechanical properties of 3D-printed pure copper produced using a low-pressure cold spray system. Microstructural analysis is performed through optical microscopy, while tensile tests are used to evaluate mechanical properties. Samples processed with N2 demonstrate improved plastic deformation, leading to reduced porosity compared to those processed with He.