Frigola, P. Agustsson, R.B. Ciovati, G. Clemens, W.A. Dhakal, P. Faillace, L. Marhauser, F. Mireles, J. Morton, P.A. Murokh, A.Y. Rimmer, R.A. Spradlin, J.K. Wicker, R.B. Williams, R.S. JACoW Geneva, Switzerland 978-3-95450-178-6 10.18429/JACoW-SRF2015-THPB042 English 1181-1184 THPB042 niobium cavity SRF electron vacuum Contribution to a conference proceedings 2015 2015-12 http://dx.doi.org/10.18429/JACoW-SRF2015-THPB042 http://srf2015.vrws.de/papers/thpb042.pdf An alternative fabrication method for superconducting radio frequency (SRF) cavities is presented. The novel fabrication method, based on 3D printing (or additive manufacturing, AM) technology capable of producing net-shape functional metallic parts of virtually any geometry, promises to greatly expand possibilities for advance cavity and end-group component designs. A description of the AM method and conceptual cavity designs are presented along with material analysis and RF measurement results of additively manufactured niobium samples.