Defect structure process maps for laser powder bed fusion additive manufacturing
Jerard V.Gordon, Sneha P.Narra, Ross W.Cunningham, He Liu, Hangman Chen, Robert M.Suter, Jack L.Beuth, Anthony D.Rollett - Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, USA / Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, USA / Next Manufacturing Center, Carnegie Mellon University, Pittsburgh, USA / Department of Physics, Carnegie Mellon University, Pittsburgh, USA
Accurate detection, characterization, and prediction of defects has great potential for immediate impact in the production of fully-dense and defect free metal additive manufacturing (AM) builds. Accordingly, this paper presents Defect Structure Process Maps (DSPMs) as a means of quantifying the role of porosity as an exemplary defect structure in powder bed printed materials. Synchrotron-based micro-computed tomography (μSXCT) was used to demonstrate that metal AM defects follow predictable trends within processing parameter space for laser powder bed fusion (LPBF) materials.