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

Haijun Gong*, Venkata Karthik Nadimpalli, Khalid Rafi, Thomas Starr, Brent Stucker

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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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.
Original languageEnglish
Article number44
Issue number2
Pages (from-to)12
Publication statusPublished - 2019

Bibliographical note

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.


  • Micro-CT
  • Defects
  • Porosity
  • Ti-6Al-4V
  • Additive manufacturing


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