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Effects of Thermal Camera Resolution on Feature Extraction in Selective Laser Melting
(University of Texas at Austin, 2018)
Selective Laser Melting (SLM) is a common additive manufacturing process which uses a
laser energy source to fuse metal powder layer by layer. Engineering properties and
microstructure are related to the part’s thermal ...
In-Situ Optical Emission Spectroscopy during SLM of 304L Stainless Steel
(University of Texas at Austin, 2018)
This paper demonstrates the potential of in-situ Optical Emission Spectroscopy (OES) to
monitor the Selective Laser Melting (SLM) process. A spectrometer is split into the beam path of
a home-built SLM system to collect ...
Use of SWIR Imaging to Monitor Layer-to-Layer Part Quality During SLM of 304L Stainless Steel
(University of Texas at Austin, 2018)
This paper evaluates using in-situ SWIR imaging to monitor part quality and identify
potential defect locations introduced during Selective Laser Melting (SLM) of 304L stainless steel.
The microstructure (porosity, grain ...
In-situ Local Part Qualification of SLM 304L Stainless Steel through Voxel Based Processing of SWIR Imaging Data
(University of Texas at Austin, 2019)
This paper demonstrates the potential for qualification through local part property
prediction of 304L stainless steel parts manufactured by Selective Laser Melting (SLM). This is
accomplished through voxel based processing ...
Unsupervised Defect Classification of 2D SEM and 3D X-Ray CT Images from Laser Powder Bed Fusion
(University of Texas at Austin, 2021)
This work discusses a method to classify defects in laser powder bed fusion using 2D
images of layer samples taken by Scanning Electron Microscope (SEM) and 3D image stacks of a
full part by X-Ray Computed Tomography ...
Image Registration and Matching Error in 2D and 3D for Laser Powder Bed Fusion
(University of Texas at Austin, 2021)
This work outlines a method to register 2D and 3D images taken post-process and in situ
from 301L stainless steel parts printed by Laser Powder Bed Fusion. The process uses
DREAM.3D, an open-source software that provides ...
Experiment Based Superposition Thermal Modeling of Laser Powder Bed Fusion
(University of Texas at Austin, 2021)
This paper evaluates experiment-based superposition thermal modeling for Laser Powder
Bed Fusion (LPBF) with a pulsed laser. An analytical pulsed laser thermal model establishes the
modeling procedure. The framework ...
Methods of Extrusion on Demand for High Solids Loading Ceramic Paste in Freeform Extrusion Fabrication
(University of Texas at Austin, 2015)
Fabrication of highly dense parts with complex geometry by paste-extrusion-based solid
freeform fabrication processes requires a precise control of the extrusion flow rate to dispense
material on demand, which is often ...
Planning Freeform Extrusion Fabrication Processes with Consideration of Horizontal Staircase Effect
(University of Texas at Austin, 2015)
An algorithm has been developed to estimate the “horizontal” staircase effect and a technique is
proposed to reduce this type of geometrical error for freeform extrusion fabrication processes of 3D “solid”
parts. The ...
Optimal Rastering Orientation in Freeform Extrusion Fabrication Processes
(University of Texas at Austin, 2015)
Many researchers have tried to optimize the build direction of additively manufactured parts to minimize
the vertical staircase effect. However, the horizontal staircase effect should also be considered when fully ...