Advances in the study of the alloy NCF 3015 processed by additive manufacturing

Abstract

The present work summarizes the advances achieved in the development of the alloy NCF 3015 to be processed by additive manufacturing. Based on previous results from five preselected printing parameters, focus was placed in the refinement of those findings. In that sense, in-deep research towards the understanding of process-related micro cracks as well as the first steps into the mechanical characterization by tensile tests were done. Specimens for such purposes were produced in both, building and perpendicular directions, XZ / YZ and XY respectively. Additionally, the resultant combinations were subjected to different thermal treatments which ranged from simple stress relieving cycles to partial solution treatment and aging.
Results have shown promising mechanical properties of the alloy NCF 3015 after being processed by additive manufacturing. However, as same as traditional Nickel base superalloys, this material presents microcracks what would considerably limit its potential application range, unless resolved, especially in working conditions involving dynamic loading.