|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Correlating Pore Defect Formation in Laser Powder Bed Fusion Processing with In Situ Thermal and Interferometric Optical Measurement
||Manyalibo Matthews, Philip Depond, Jean Baptiste Forien, Sonny Ly, Gabe Guss, Bradley Jared, Jonathan Madison, Elena Garlea, Hahn Choo, Christopher Spadaccini
|On-Site Speaker (Planned)
The relationship between metal alloy additive manufacturing process parameters and the formation of defects must be understood in order to pave the way towards defect-free builds. Although extremely informative and prevalent, post-build non-destructive evaluation techniques can be costly, slow, and limited in terms of accessible range into large parts. In-line optical diagnostics provide the extended advantage of tracing the tool paths non-invasively during the melting process or between layers Compared with other techniques, optical coherence tomography (OCT), enables long working distance and with micrometer scale resolution of surface structure in metals. With the goal of accelerating the certification of additively manufactured metals, we show how fast sampling 100 kHz OCT, coupled with 100 kHz optical pyrometry can be correlated with pore defects identified using X-ray micro-computed tomography. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
||Planned: Supplemental Proceedings volume