A Single Crystal Process Window for Electron Beam Powder Bed Fusion Additive Manufacturing of a CMSX-4 Type Ni-Based Superalloy
Julian Pistor, Christoph Breuning, Carolin Körner
Abstract
Using suitable scanning strategies, even single crystals can emerge from powder during additive manufacturing. In this paper, a full microstructure map for additive manufacturing of technical single crystals is presented using the conventional single crystal Ni-based superalloy CMSX-4. The correlation between process parameters, melt pool size and shape, as well as single crystal fraction, is investigated through a high number of experiments supported by numerical simulations. Based on these results, a strategy for the fabrication of high fraction single crystals in powder bed fusion additive manufacturing is deduced.
Topics & Concepts
Materials scienceMicrostructureSuperalloyFabricationFusionProcess windowSingle crystalScanning electron microscopeMetallurgyComposite materialCrystallographyOptoelectronicsChemistryMedicinePhilosophyLithographyPathologyLinguisticsAlternative medicineAdditive Manufacturing Materials and ProcessesAdditive Manufacturing and 3D Printing TechnologiesHigh Temperature Alloys and Creep