Powder bed charging during electron-beam additive manufacturing

Cordero, Zachary C.; Meyer, Harry M.; Nandwana, Peeyush; Dehoff, Ryan R.

doi:10.1016/j.actamat.2016.11.012

Title: Powder bed charging during electron-beam additive manufacturing

Journal Article · Fri Nov 18 00:00:00 EST 2016 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2016.11.012· OSTI ID:1362208

Cordero, Zachary C. ^[1]; Meyer, Harry M. ^[2]; Nandwana, Peeyush ^[1]; Dehoff, Ryan R. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility and Materials Science and Technology Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division

Electrons injected into the build envelope during powder-bed electron-beam additive manufacturing can accumulate on the irradiated particles and cause them to repel each other. Furthermore, these electrostatic forces can grow so large that they drive the particles out of the build envelope in a process known as smoking. Here, a model of powder bed charging is formulated and used to develop criteria that predict the conditions under which the powder bed will smoke. These criteria suggest dependences on particle size, pre-heat temperature, and process parameters that align closely with those observed in practice.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility (MDF)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1362208

Alternate ID(s):: OSTI ID: 1397781

Journal Information:: Acta Materialia, Vol. 124, Issue C; ISSN 1359-6454

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 42 works

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Mapping the Tray of Electron Beam Melting of Ti-6Al-4V: Properties and Microstructure Tiferet, E.; Ganor, M.; Zolotaryov, D. Materials, Vol. 12, Issue 9 https://doi.org/10.3390/ma12091470	journal	May 2019
Can Appropriate Thermal Post-Treatment Make Defect Content in as-Built Electron Beam Additively Manufactured Alloy 718 Irrelevant? Goel, Sneha; Bourreau, Kévin; Olsson, Jonas Materials, Vol. 13, Issue 3 https://doi.org/10.3390/ma13030536	journal	January 2020
Thermal debinding mass transfer mechanism and dynamics of copper green parts fabricated by an innovative 3D printing method Yan, Xiaokang; Wang, Chao; Xiong, Wei RSC Advances, Vol. 8, Issue 19 https://doi.org/10.1039/c7ra13149f	journal	January 2018

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