CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 10597 > Article
Open Access Presentation
27 March 2018 Additive manufacturing of metals as seen from within: in situ optical probes for defect mapping (Conference Presentation)
Manyalibo J. Matthews
Author Affiliations +
Proceedings Volume 10597, Nano-, Bio-, Info-Tech Sensors, and 3D Systems II; 1059708 (2018) https://doi.org/10.1117/12.2299494
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2018, Denver, Colorado, United States
Abstract
Irregularities in process conditions during powder bed fusion (PBF) additive manufacturing (AM) can lead to localized defects and poor part quality. At the same time, because PBF-AM is a layer-by-layer process, material properties such as defect concentration can be characterized in situ, thus providing an opportunity to ‘qualify as you build.’ Here we review methods based on high speed, multi-wavelength optical measurements of melt pool evolution, material ejection and layer-to-layer height variation during PBF processing, and compare the results to ex situ x-ray tomographic measurements. We also discuss the complex mechanisms related to the interaction between the melt pool, laser beam, and powder bed which ultimately drive defect formation. Along with providing process monitoring data to facilitate part certification, data provided by in situ optical diagnostics can help validate process models. The practical implementation of these high speed diagnostics into commercial platforms is also discussed. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Manyalibo J. Matthews "Additive manufacturing of metals as seen from within: in situ optical probes for defect mapping (Conference Presentation)", Proc. SPIE 10597, Nano-, Bio-, Info-Tech Sensors, and 3D Systems II, 1059708 (27 March 2018); https://doi.org/10.1117/12.2299494
PROCEEDINGS
 PRESENTATION
WATCH
PRESENTATION SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
KEYWORDS
Additive manufacturing
Metals
Optics manufacturing
Data modeling
Process modeling
Laser beam diagnostics
Materials processing
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top