IDENTIFICATION OF ACOUSTIC EMISSION SIGNATURES OF THE DIRECT LASER MELTING PROCESS
K. A. Stepanova1, D. O. Kuzivanov2, A. V. Fedorov2, I. Yu. Kinzhagulov2
1Institution of Science "Engineering and Design Center for Support of Space Technology Operation,", Saint Petersburg, Russia
2ITMO University, Saint Petersburg, Russia
Keywords: acoustic emission, additive manufacturing, direct laser melting, in-situ monitoring, non-destructive testing
Abstract
The paper presents results of identification of acoustic emission signatures of processes occurring during direct laser melting. As part of the experimental study, samples from the powder alloy EP 648 are grown in various modes with simultaneous recording of acoustic emission signals. Based on the results of the analysis of the registered signals parameters, their characteristic distribution patterns are formed during laser melting of defect-free and defective samples.
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