TY - GEN
T1 - Sensing for directed energy deposition and powder bed fusion additive manufacturing at Penn State University
AU - Nassar, Abdalla R.
AU - Reutzel, Edward W.
AU - Brown, Stephen W.
AU - Morgan, John P.
AU - Morgan, Jacob P.
AU - Natale, Donald J.
AU - Tutwiler, Rick L.
AU - Feck, David P.
AU - Banks, Jeffery C.
N1 - Funding Information:
This work was supported in part by the Office of Naval Research, under Contract No. N00014-11-1-0668. Any opinions, findings and conclusions or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the Office of Naval Research.This work was supported in part by the Air Force Research Laboratory through America Makes under agreement number FA8650-12-2-7230.The U.S. Government is authorized to reproduce and distribute reprints for Governmental purposes notwithstanding any copyright notation thereon. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of Air Force Research Laboratory, or the U.S. Government.
Publisher Copyright:
© 2016 SPIE.
PY - 2016
Y1 - 2016
N2 - Additive manufacturing of metal components through directed energy deposition or powder bed fusion is a complex undertaking, often involving hundreds or thousands of individual laser deposits. During processing, conditions may fluctuate, e.g. material feed rate, beam power, surrounding gas composition, local and global temperature, build geometry, etc., leading to unintended variations in final part geometry, microstructure and properties. To assess or control as-deposited quality, researchers have used a variety of methods, including those based on sensing of melt pool and plume emission characteristics, characteristics of powder application, and layer-wise imaging. Here, a summary of ongoing process monitoring activities at Penn State is provided, along with a discussion of recent advancements in the area of layer-wise image acquisition and analysis during powder bed fusion processing. Specifically, methods that enable direct comparisons of CAD model, build images, and 3D micro-tomographic scan data will be covered, along with thoughts on how such analyses can be related to overall process quality.
AB - Additive manufacturing of metal components through directed energy deposition or powder bed fusion is a complex undertaking, often involving hundreds or thousands of individual laser deposits. During processing, conditions may fluctuate, e.g. material feed rate, beam power, surrounding gas composition, local and global temperature, build geometry, etc., leading to unintended variations in final part geometry, microstructure and properties. To assess or control as-deposited quality, researchers have used a variety of methods, including those based on sensing of melt pool and plume emission characteristics, characteristics of powder application, and layer-wise imaging. Here, a summary of ongoing process monitoring activities at Penn State is provided, along with a discussion of recent advancements in the area of layer-wise image acquisition and analysis during powder bed fusion processing. Specifically, methods that enable direct comparisons of CAD model, build images, and 3D micro-tomographic scan data will be covered, along with thoughts on how such analyses can be related to overall process quality.
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U2 - 10.1117/12.2217855
DO - 10.1117/12.2217855
M3 - Conference contribution
AN - SCOPUS:84981244652
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Laser 3D Manufacturing III
A2 - Pique, Alberto
A2 - Gu, Bo
A2 - Helvajian, Henry
PB - SPIE
T2 - Laser 3D Manufacturing III
Y2 - 15 February 2016 through 18 February 2016
ER -