Abstract
Laser Directed Energy Deposition (DED) is an additive manufacturing (AM) technique which enables us to fabricate 3D structures by melting material as it is deposited. The mechanical behavior and reliability of components fabricated via laser DED is still not completely understood, which in turn is disadvantageous for its adoption in the industry at a large scale. The goal is to fabricate components with similar properties as those fabricated by traditional manufacturing processes. An evaluation of the mechanical properties of laser DED structures is necessary to determine their adequacy in engineering applications. The present study compares the ultrasonic response of pure Stainless Steel (SS) 420LC and Inconel 718LC samples fabricated via DED to samples of the same materials fabricated via cold-rolling in order to establish the baseline UT response. This work focuses on the ultrasonic velocities, attenuation and backscatter coefficients as functions of frequency. The velocities were also used to measure any anisotropy in the samples. Ultrasonic C-Scans are presented to quantify any defects found during fabrication. These will be compared against destructive measurements.
How to Cite:
Huanes-Alvan, G., O’Neil, A., Sahasrabudhe, H. & Chakrapani, S., (2019) “Baseline estimation of ultrasonic response of metallic structures fabricated via laser direct energy deposition (DED)”, Review of Progress in Quantitative Nondestructive Evaluation .
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