Revealing particle-scale powder spreading dynamics in powder-bed-based additive manufacturing process by high-speed x-ray imaging

Escano, Luis I.; Parab, Niranjan D.; Xiong, Lianghua; Guo, Qilin; Zhao, Cang; Fezzaa, Kamel; Everhart, Wes; Sun, Tao; Chen, Lianyi

doi:10.1038/s41598-018-33376-0

Title: Revealing particle-scale powder spreading dynamics in powder-bed-based additive manufacturing process by high-speed x-ray imaging

Journal Article · Wed Oct 10 00:00:00 EDT 2018 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-018-33376-0· OSTI ID:1487034

Escano, Luis I. ^[1];

^[2]; Xiong, Lianghua ^[1]; Guo, Qilin ^[1];

^[2]; Fezzaa, Kamel ^[2]; Everhart, Wes ^[3];

^[2];

^[1]

Missouri Univ. of Science and Technology, Rolla, MO (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Dept. of Energy’s Kansas City National Security Campus Managed by Honeywell FM&T, Kansas City, MO (United States)

Powder spreading is a key step in the powder-bed-based additive manufacturing process, which determines the quality of the powder bed and, consequently, affects the quality of the manufactured part. However, powder spreading behavior under additive manufacturing condition is still not clear, largely because of the lack of particle-scale experimental study. Here, we studied particle-scale powder dynamics during the powder spreading process by using in-situ high-speed high-energy x-ray imaging. Evolution of the repose angle, slope surface speed, slope surface roughness, and the dynamics of powder clusters at the powder front were revealed and quantified. Interactions of the individual metal powders, with boundaries (substrate and container wall), were characterized, and coefficients of friction between the powders and boundaries were calculated. The effects of particle size on powder flow dynamics were revealed. Here, the particle scale powder spreading dynamics, reported here, are important for a thorough understanding of powder spreading behavior in the powder-bed-based additive manufacturing process, and are critical to the development and validation of models that can more accurately predict powder spreading behavior.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF); Honeywell Federal Manufacturing and Technologies, LLC; USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1487034

Journal Information:: Scientific Reports, Vol. 8, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 67 works

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A laser powder bed fusion system for in situ x-ray diffraction with high-energy synchrotron radiation Uhlmann, Eckart; Krohmer, Erwin; Schmeiser, Felix Review of Scientific Instruments, Vol. 91, Issue 7 https://doi.org/10.1063/1.5143766	journal	July 2020
Benchmark Study of Thermal Behavior, Surface Topography, and Dendritic Microstructure in Selective Laser Melting of Inconel 625 Gan, Zhengtao; Lian, Yanping; Lin, Stephen E. Integrating Materials and Manufacturing Innovation, Vol. 8, Issue 2 https://doi.org/10.1007/s40192-019-00130-x	journal	April 2019
Probing Ultrafast Dynamics in Laser Powder Bed Fusion Using High-Speed X-Ray Imaging: A Review of Research at the Advanced Photon Source Sun, Tao JOM, Vol. 72, Issue 3 https://doi.org/10.1007/s11837-020-04015-9	journal	January 2020
A laser powder bed fusion system for in situ x-ray diffraction with high-energy synchrotron radiation Uhlmann, Eckart; Krohmer, Erwin; Schmeiser, Felix Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2020-02554	text	January 2020

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