The high-speed synchrotron X-ray imaging technique was synchronized with a custom-built laser-melting setup to capture the dynamics of laser powder-bed fusion processes in situ. Various significant phenomena, including vapor-depression and melt-pool dynamics and powder-spatter ejection, were captured with high spatial and temporal resolution. Imaging frame rates of up to 10 MHz were used to capture the rapid changes in these highly dynamic phenomena. At the same time, relatively slow frame rates were employed to capture large-scale changes during the process. This experimental platform will be vital in the further understanding of laser additive manufacturing processes and will be particularly helpful in guiding efforts to reduce or eliminate microstructural defects in additively manufactured parts.
N. D. Parab et al., "Ultrafast X-Ray Imaging of Laser-Metal Additive Manufacturing Processes," Journal of Synchrotron Radiation, vol. 25, no. 5, pp. 1467-1477, Wiley-Blackwell, Sep 2018.
The definitive version is available at https://doi.org/10.1107/S1600577518009554
Mechanical and Aerospace Engineering
Intelligent Systems Center
Keywords and Phrases
3D printers; Powder metals; Experimental platform; Laser additive manufacturing; Laser powders; Melt pool; Microstructural defects; Particle ejection; Spatial and temporal resolutions; Xray imaging; Image processing; Additive manufacturing; Laser powder-bed fusion; Melt pools; Particle ejection; Vapor depressions; X-ray imaging
International Standard Serial Number (ISSN)
Article - Journal
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01 Sep 2018