Ercan Cakmak (1), Philip Bingham (2), Ross W. Cunningham (3), Anthony D. Rollett (3), Xianghui Xiao (5), Ryan R. Dehoff (1)
Materials Characterization, 173, January 2021. DOI: 10.1016/j.matchar.2021.110894

Keywords

Additive manufacturing; X-ray computed tomography; Microstructure; Porosity

Abstract

This work focuses on the use of x-ray computed tomography for non-destructive characterization of additively manufactured parts. Ti-6Al-4V parts manufactured using electron beam melting were used. Within this context a comparative study between laboratory and synchrotron-based x-ray computed tomography (LXCT and SXCT) is presented showing the advantages of both techniques. Additionally, the interplay between field-of-view, resolution and sub-sample extraction is systematically presented both qualitatively and quantitatively for LXCT. Overall, it was concluded that laboratory based μXCT offered a compelling alternative to SXCT for static measurements involving defect characterization in AM parts while synchrotron-based techniques offered unmatched performance for dynamic and sub-micron studies.

How Our Software Was Used

Dragonfly was used for image processing, segmentation and quantification.

Author Affiliation

(1) Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
(2) Electrical and Electronics Systems Research Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
(3) Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
(5) Brookhaven National Laboratory, 743 Brookhaven Avenue, Upton, NY 11973, USA.