title: Synchrotron X-ray CT characterization of titanium parts fabricated by additive manufacturing. Part II. Defects.
abstract: Synchrotron X-ray tomography (SXRT) has been applied to the study of defects within three-dimensional printed titanium parts. These parts were made using the Arcam EBM(®) (electron beam melting) process which uses powdered titanium alloy, Ti64 (Ti alloy with approximately 6%Al and 4%V) as the feed and an electron beam for the sintering/welding. The experiment was conducted on the Imaging and Medical Beamline of the Australian Synchrotron. The samples represent a selection of complex shapes with a variety of internal morphologies. Inspection via SXRT has revealed a number of defects which may not otherwise have been seen. The location and nature of such defects combined with detailed knowledge of the process conditions can contribute to understanding the interplay between design and manufacturing strategy. This fundamental understanding may subsequently be incorporated into process modelling, prediction of properties and the development of robust methodologies for the production of defect-free parts.
authors.affiliation: Mineral Resources, CSIRO, Bayview Avenue, Clayton, Victoria 3168, Australia.
authors.forename: Nicola Vivienne Yorke
authors.initials: NV
authors.lastname: Scarlett
authors.affiliation: Information Management and Technology, CSIRO, Bayview Avenue, Clayton, Victoria 3168, Australia.
authors.forename: Peter
authors.initials: P
authors.lastname: Tyson
authors.affiliation: Manufacturing, CSIRO, Bayview Avenue, Clayton, Victoria 3168, Australia.
authors.forename: Darren
authors.initials: D
authors.lastname: Fraser
authors.affiliation: Manufacturing, CSIRO, Bayview Avenue, Clayton, Victoria 3168, Australia.
authors.forename: Sheridan
authors.initials: S
authors.lastname: Mayo
authors.affiliation: Imaging and Medical Beamline, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia.
authors.forename: Anton
authors.initials: A
authors.lastname: Maksimenko
keywords: X-ray tomography; additive manufacturing; titanium