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Proceedings Paper

Thermographic in-situ process monitoring of the electron-beam melting technology used in additive manufacturing
Author(s): Ralph B. Dinwiddie; Ryan R Dehoff; Peter D. Lloyd; Larry E. Lowe; Joe B. Ulrich
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Paper Abstract

Oak Ridge National Laboratory (ORNL) has been utilizing the ARCAM electron beam melting technology to additively manufacture complex geometric structures directly from powder. Although the technology has demonstrated the ability to decrease costs, decrease manufacturing lead-time and fabricate complex structures that are impossible to fabricate through conventional processing techniques, certification of the component quality can be challenging. Because the process involves the continuous deposition of successive layers of material, each layer can be examined without destructively testing the component. However, in-situ process monitoring is difficult due to metallization on inside surfaces caused by evaporation and condensation of metal from the melt pool. This work describes a solution to one of the challenges to continuously imaging inside of the chamber during the EBM process. Here, the utilization of a continuously moving Mylar film canister is described. Results will be presented related to in-situ process monitoring and how this technique results in improved mechanical properties and reliability of the process.

Paper Details

Date Published: 22 May 2013
PDF: 9 pages
Proc. SPIE 8705, Thermosense: Thermal Infrared Applications XXXV, 87050K (22 May 2013); doi: 10.1117/12.2018412
Show Author Affiliations
Ralph B. Dinwiddie, Oak Ridge National Lab. (United States)
Ryan R Dehoff, Oak Ridge National Lab. (United States)
Peter D. Lloyd, Oak Ridge National Lab. (United States)
Larry E. Lowe, Oak Ridge National Lab. (United States)
Joe B. Ulrich, Oak Ridge Institute for Science and Education (United States)

Published in SPIE Proceedings Vol. 8705:
Thermosense: Thermal Infrared Applications XXXV
Gregory R. Stockton; Fred P. Colbert, Editor(s)

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