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Micro-CT Evaluation of Defects in Ti-6Al-4V Parts Fabricated by Metal Additive Manufacturing

Manufacturing Engineering Department, Georgia Southern University, Statesboro, GA 30458, USA
Department of Mechanical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
UL International-Singapore Pte Ltd, Singapore 138628, Singapore
J. B. Speed School of Engineering, University of Louisville, Louisville, KY 40292, USA
ANSYS, Inc, Park City, UT 84098, USA
Author to whom correspondence should be addressed.
Technologies 2019, 7(2), 44;
Received: 3 May 2019 / Revised: 7 June 2019 / Accepted: 10 June 2019 / Published: 12 June 2019
PDF [7767 KB, uploaded 12 June 2019]


In this study, micro-computed tomography (CT) is utilized to detect defects of Ti-6Al-4V specimens fabricated by selective laser melting (SLM) and electron beam melting (EBM), which are two popular metal additive manufacturing methods. SLM and EBM specimens were fabricated with random defects at a specific porosity. The capability of micro-CT to evaluate inclusion defects in the SLM and EBM specimens is discussed. The porosity of EBM specimens was analyzed through image processing of CT single slices. An empirical method is also proposed to estimate the porosity of reconstructed models of the CT scan. View Full-Text
Keywords: micro-CT; defects; porosity; Ti-6Al-4V; additive manufacturing micro-CT; defects; porosity; Ti-6Al-4V; additive manufacturing

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Gong, H.; Nadimpalli, V.K.; Rafi, K.; Starr, T.; Stucker, B. Micro-CT Evaluation of Defects in Ti-6Al-4V Parts Fabricated by Metal Additive Manufacturing. Technologies 2019, 7, 44.

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