Next Article in Journal
The Helical Magnet MnSi: Skyrmions and Magnons
Next Article in Special Issue
3D Visualized Characterization of Fracture Behavior of Structural Metals Using Synchrotron Radiation Computed Microtomography
Previous Article in Journal
Acknowledgement to Reviewers of QuBS in 2018
Previous Article in Special Issue
Stress Relaxation Related to Spontaneous Thin Film Buckling: Correlation between Finite Element Calculations and Micro Diffraction Analysis
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessArticle

3D Shape Analysis of Powder for Laser Beam Melting by Synchrotron X-ray CT

1
Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
2
Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str.24-25, 14476 Potsdam, Germany
*
Author to whom correspondence should be addressed.
Quantum Beam Sci. 2019, 3(1), 3; https://doi.org/10.3390/qubs3010003
Received: 1 October 2018 / Revised: 17 January 2019 / Accepted: 8 February 2019 / Published: 19 February 2019
  |  
PDF [5211 KB, uploaded 27 February 2019]
  |     |  

Abstract

The quality of components made by laser beam melting (LBM) additive manufacturing is naturally influenced by the quality of the powder bed. A packing density <1 and porosity inside the powder particles lead to intrinsic voids in the powder bed. Since the packing density is determined by the particle size and shape distribution, the determination of these properties is of significant interest to assess the printing process. In this work, the size and shape distribution, the amount of the particle’s intrinsic porosity, as well as the packing density of micrometric powder used for LBM, have been investigated by means of synchrotron X-ray computed tomography (CT). Two different powder batches were investigated: Ti–6Al–4V produced by plasma atomization and stainless steel 316L produced by gas atomization. Plasma atomization particles were observed to be more spherical in terms of the mean anisotropy compared to particles produced by gas atomization. The two kinds of particles were comparable in size according to the equivalent diameter. The packing density was lower (i.e., the powder bed contained more voids in between particles) for the Ti–6Al–4V particles. The comparison of the tomographic results with laser diffraction, as another particle size measurement technique, proved to be in agreement. View Full-Text
Keywords: additive manufacturing; laser beam melting; synchrotron computed tomography; imaging; powder analysis additive manufacturing; laser beam melting; synchrotron computed tomography; imaging; powder analysis
Figures

Figure 1

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).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Thiede, T.; Mishurova, T.; Evsevleev, S.; Serrano-Munoz, I.; Gollwitzer, C.; Bruno, G. 3D Shape Analysis of Powder for Laser Beam Melting by Synchrotron X-ray CT. Quantum Beam Sci. 2019, 3, 3.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Quantum Beam Sci. EISSN 2412-382X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top