Title

In-Situ Acoustic Emission Monitoring in Additive Manufacturing Processes

Document Type

Conference Proceeding

Publication Date

4-20-2018

Publication Title

AIP Conference Proceeding

DOI

10.1063/1.5031503

ISBN

978-0-7354-1644-4

ISSN

1551-7616

Abstract

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.

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