146 citations · 158 across the 10 of their papers we have counts for
10 papers
Radiometric Temperature Measurement for Metal Additive Manufacturing via Temperature Emissivity Separation
Ryan W. Penny, A. John Hart
Emission of blackbody emission from the meltpool and surrounding area in laser powder bed fusion (LPBF) makes this process visible to a range of optical monitoring instruments inte…
High-Fidelity Optical Monitoring of Laser Powder Bed Fusion via Aperture Division Multiplexing
Ryan W. Penny, Zachery Kutschke, A. John Hart
Qualification of high-performance metal components produced by laser powder bed fusion (LPBF) must identify process-induced porous defects that reduce ductility and nucleate fatigu…
A rapid experimental workflow for studying melt track scaling in laser powder bed fusion using high-precision metal template substrates
Reimar Weissbach, Ryan W. Penny, A. John Hart
Development and qualification of process parameters in laser powder bed fusion (LPBF) commonly involves many variables. At the outset of development, whether transferring known par…
Quantitative analysis of thin metal powder layers via transmission X-ray imaging and discrete element simulation: Blade-based spreading approaches
Ryan W. Penny, Daniel Oropeza, Patrick M. Praegla +4
Spreading uniform and dense layers is of paramount importance to creating high-quality components using powder bed additive manufacturing (AM). Blade-like tools are often employed…
Quantitative analysis of thin metal powder layers via transmission X-ray imaging and discrete element simulation: Roller-based spreading approaches
Ryan W. Penny, Daniel Oropeza, Reimar Weissbach +4
A variety of tools can be used for spreading metal, ceramic, and polymer feedstocks in powder bed additive manufacturing methods. Rollers are often employed when spreading powders…
A Testbed for Investigation of Selective Laser Melting at Elevated Atmospheric Pressure
David A. Griggs, Jonathan S. Gibbs, Stuart P. Baker +3
Metal additive manufacturing (AM) by laser powder bed fusion (L-PBF) builds upon fundamentals established in the field of laser welding which include the influence of gas and plume…
Spatial Mapping of Powder Layer Density for Metal Additive Manufacturing via X-ray Microscopy
Ryan W. Penny, Patrick M. Praegla, Marvin Ochsenius +4
Uniform powder spreading is a requisite for creating consistent, high-quality components via powder bed additive manufacturing (AM), wherein layer density and uniformity are comple…
On-lattice voxelated convolutional neural networks for prediction of phase diagrams and diffusion barriers in cubic alloys
Seyedeh Mohadeseh Taheri-Mousavi, Seyed Sina Moeini-Ardakani, Ryan W. Penny +2
Cluster expansion approximates an on-lattice potential with polynomial regression. We show that using a convolutional neural network (CNN) instead leads to more accurate prediction…
Physics-Based Modeling and Predictive Simulation of Powder Bed Fusion Additive Manufacturing Across Length Scales
Christoph Meier, Sebastian L. Fuchs, Nils Much +10
Powder bed fusion additive manufacturing (PBFAM) of metals has the potential to enable new paradigms of product design, manufacturing and supply chains while accelerating the reali…
Thermophysical Phenomena in Metal Additive Manufacturing by Selective Laser Melting: Fundamentals, Modeling, Simulation and Experimentation
Christoph Meier, Ryan W. Penny, Yu Zou +2
Among the many additive manufacturing (AM) processes for metallic materials, selective laser melting (SLM) is arguably the most versatile in terms of its potential to realize compl…