Sensor fusion of pyrometry and acoustic measurements for localized keyhole pore identification in laser powder bed fusion

Tempelman, Joshua R.; Wachtor, Adam J.; Flynn, Eric B.; Depond, Phillip J.; Forien, Jean-Baptiste; Guss, Gabe M.; Calta, Nicholas P.; Matthews, Manyalibo J.

doi:10.1016/j.jmatprotec.2022.117656

Sensor fusion of pyrometry and acoustic measurements for localized keyhole pore identification in laser powder bed fusion

Journal Article · Fri Jun 10 00:00:00 EDT 2022 · Journal of Materials Processing Technology

DOI:https://doi.org/10.1016/j.jmatprotec.2022.117656· OSTI ID:1873343

Tempelman, Joshua R.; Wachtor, Adam J.; Flynn, Eric B.; Depond, Phillip J.; Forien, Jean-Baptiste; Guss, Gabe M.; Calta, Nicholas P.; Matthews, Manyalibo J.

We report in-situ process monitoring as an aid to part qualification for laser powder-bed fusion (L-PBF) technology is a topic of increasing interest to the additive manufacturing community. In this work, airborne acoustic and inline pyrometry measurements were recorded simultaneously with the laser position. X-ray radiography imaging was used to spatio-temporally register keyhole pore locations to the pyrometry and acoustic signals, enabling binary labeling of data partitions based on pore formation. These labeled partitions were subsequently featurized using a highly comparative time-series analysis toolbox. Acoustic data was found to be much more effective than the pyrometry data for keyhole pore identification. However, when the information contained in both sensing modalities was combined in a sensor fusion strategy, the error rates of the top performing models were significantly reduced.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Grant/Contract Number:: 89233218CNA000001; AC52-07NA27344; AC02-05CH11231

OSTI ID:: 1873343

Alternate ID(s):: OSTI ID: 1876958
OSTI ID: 1961036

Report Number(s):: LA-UR-22-20210

Journal Information:: Journal of Materials Processing Technology, Journal Name: Journal of Materials Processing Technology Vol. 308; ISSN 0924-0136

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
laser powder-bed fusion
sensor fusion
pore identification

Sensor fusion of pyrometry and acoustic measurements for localized keyhole pore identification in laser powder bed fusion

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