6 papers
Spreading of highly cohesive metal powders with transverse oscillation kinematics
Reimar Weissbach, Garrett Adams, Patrick M. Praegla +2
Powder bed additive manufacturing processes such as laser powder bed fusion (LPBF) or binder jetting (BJ) benefit from using fine (D50 ) powders. However, the increasin…
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…
Machine Learning for Identifying Grain Boundaries in Scanning Electron Microscopy (SEM) Images of Nanoparticle Superlattices
Aanish Paruchuri, Carl Thrasher, A. J. Hart +2
Nanoparticle superlattices consisting of ordered arrangements of nanoparticles exhibit unique optical, magnetic, and electronic properties arising from nanoparticle characteristics…
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…
Automated Segmentation and Analysis of Microscopy Images of Laser Powder Bed Fusion Melt Tracks
Aagam Shah, Reimar Weissbach, David A. Griggs +3
With the increasing adoption of metal additive manufacturing (AM), researchers and practitioners are turning to data-driven approaches to optimise printing conditions. Cross-sectio…
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…