The use of nano-computed tomography (nano-CT) in non-destructive testing of metallic parts made by laser powder-bed fusion additive manufacturing
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Computed tomography (CT) magnifies the spectrum of measurable internal features with minimal preparation and exceptional resolution. In this study, non-destructive nano-scale and micro-scale CT examinations of aluminum-based part manufactured by laser powder-bed fusion additive manufacturing (LPBF-AM) are compared to determine the extent of defect details (size and distribution of defects/pores) not detectable with micro-CT. Our findings show nano-CT system is able to provide insightful information for effective characterization of AM-made parts to predict their strength/durability more reliably.
KeywordsAdditive manufacturing Laser powder-bed fusion X-ray computed tomography (XCT) Nano-scale Micro-scale
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This work is sponsored by the Federal Economic Development Agency for Southern Ontario (FedDev Ontario) and Ontario Research Fund-Research Excellence. The authors would like to acknowledge Dr. James Hinebaugh and Michael George from Expanse Microtechnologies Inc. for providing support with data acquisition and image processing.
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