|About this Abstract
||MS&T22: Materials Science & Technology
||Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
||Printability and Failure Susceptibility of Different Powder Layer Thicknesses in Laser Powder Bed Fusion
||Tayler W. Sundermann, David Shoukr, Peter Morcos, Raymundo Arroyave, Alaa Elwany, Ibrahim Karaman
|On-Site Speaker (Planned)
||Tayler W. Sundermann
Superalloy 718 has been extensively built in Laser Powder Bed Fusion and specifically within this group the development of an efficient process optimization framework that would cover the entire scanning speed (v)-laser power (P)-hatch spacing-layer thickness parameter space. During the exploration of this framework for layer heights beyond 60Ám envelope; standard performance characteristics such as % porosity was observed to be disconnected from mechanical performance. Upon further investigation, in a printability map comprised of speed, laser power, hatch spacing, and layer thickness above 60Ám there is a decreasing window of printability which is susceptible to simultaneous lack of fusion and keyholing porosity defects. To print effectively in this region could present an increase in throughput rate but is accompanied by additional challenges. This presentation will show the role of powder layer thickness on the optimum printability region and consideration of challenges to increasing layer heights.