In-situ acoustic signature monitoring in additive manufacturing processes
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Additive manufacturing is a rapidly maturing process for the production of complex metallic, ceramic, polymeric, and composite components. The processes used are numerous, and with the complex geometries involved this can make quality control and standardization of the process and inspection difficult. Acoustic emission measurements have been used previously to monitor a number of processes including machining and welding. The authors have identified acoustic signature measurement as a potential means of monitoring metal additive manufacturing processes using process noise characteristics and those discrete acoustic emission events characteristic of defect growth, including cracks and delamination. Results of acoustic monitoring for a metal additive manufacturing process (directed energy deposition) are reported. The work investigated correlations between acoustic emissions and process noise with variations in machine state and deposition parameters, and provided proof of concept data that such correlations do exist.
This proceeding may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This proceeding appeared in Koester, Lucas W., Hossein Taheri, Timothy A. Bigelow, Leonard J. Bond, and Eric J. Faierson. "In-situ acoustic signature monitoring in additive manufacturing processes." AIP Conference Proceedings 1949, no. 1 (2018): 020006. DOI: 10.1063/1.5031503. Posted with permission.