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C. Sonsino, J. Ziese (1993)
Fatigue strength and applications of cast aluminium alloys with different degrees of porosityInternational Journal of Fatigue, 15
G. Kerckhofs, J. Schrooten, Laida Elicegui, S. Bael, M. Moesen, S. Lomov, M. Wevers (2008)
Mechanical characterization of porous structures by the combined use of micro-CT and in-situ loading
EN1389
Advanced Technical Ceramics – Ceramic Composites – Physical Properties – Determination of Density and Apparent Porosity
G. Levy, R. Schindel, J. Kruth (2003)
RAPID MANUFACTURING AND RAPID TOOLING WITH LAYER MANUFACTURING (LM) TECHNOLOGIES, STATE OF THE ART AND FUTURE PERSPECTIVESCIRP Annals, 52
Adriaan Spierings, Gideon Levy (2009)
Rapid Manufacturing - auch mit SLM, 6
D. Hollander, T. Wirtz, M. Walter, R. Linker, A. Schultheis, O. Paar (2003)
Development of Individual Three-Dimensional Bone Substitutes Using “Selective Laser Melting”European Journal of Trauma, 29
M. Rombouts, J. Kruth, L. Froyen, P. Mercelis (2006)
Fundamentals of Selective Laser Melting of alloyed steel powdersCIRP Annals, 55
ASTM_International
Rapid Manufacturing Technologies Initiative F42
O. Rehme
Selective Laser Melting offenzellulärer Struktruen und Charakterisierung ihrer mechanischen Eigenschafte
F. Abe, K. Osakada, M. Shiomi, K. Uematsu, M. Matsumoto (2001)
The manufacturing of hard tools from metallic powders by selective laser meltingJournal of Materials Processing Technology, 111
ASTM_International
B 962‐08: Standard Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM ) Products Using Archimedes' Principle
J. Kruth, Ben Vandenbroucke, J. Vaerenbergh, P. Mercelis (2005)
Benchmarking of different SLS/SLM processes as Rapid Manufacturing techniques
A.B. Spierings, M. Bachofen
Generative Fertigung von Kleinserien in Metall
J.K. Gilbert, E.L. Rooy
The Influence and Control of Porosity and Inclusions in Aluminium Castings, Aluminium Alloy Castings Properties, Processes, and Applications
Sartorius
Handbuch wägetechnische Applikationen: Teil 1 – Dichte
R. Haynes (1991)
Effects of porosity on the tensile strengths of sintered ironsMetal Powder Report, 46
ASTM_International
B 311‐93/02: Test Method for Density Determination for Powder Metallurgy (PM ) Materials Containing Less Than Two Percent Porosity
O. Rehme, C. Emmelmann
Generative Fertigung von Ti‐Legierungen: Laserstrahl vs. Elektronenstrahl
M. Badrossamay, E. Yasa, J. Vaerenbergh, J. Kruth (2009)
Improving Productivity Rate in SLM of Commercial Steel Powders
A.B. Spierings, G. Levy
Comparison of density of stainless steel 316L parts produced with selective laser melting using different powder grades
D.A. Hollander, T. Wirtz, M. von Walter, R. Linker, A. Schultheis, O. Paar
Development of individual three‐dimensional bone substitutes using ‘selective laser melting’
Purpose – In the optimisation of processing parameters for additive manufactured parts using, e.g. selective laser melting (SLM) or electron beam melting, the measurement of the part densities is essential and of high interest. However, there is no common standard. Different institutes and system providers are using their own principles and guidelines. This study investigates the accuracies of the three measurement principles: Archimedes method, microscopic analysis of cross sections and X‐ray scanning. Design/methodology/approach – A total of 15 test samples on five density levels (densities between 90 and 99.5 per cent) were produced using the SLM process. The samples are analysed regarding the accuracy of the measurement principles and their reproducibility taking into account influencing parameters like the buoyancy of a sample in air (Archimedes method) or different magnifications of a cross section. Findings – The Archimedes method shows a very high accuracy (±0.08 per cent for high densities) and repeatability (±<0.1 per cent) on all density levels. In contrast to the Archimedes method, taking a micrograph of a specific cross section allows to influence the resulting density and the coefficient of variation reaches values>4 per cent. However, for low porosities, mean densities are comparable to the results of the Archimedes method even though calculated densities are typically somewhat too high. The advantage of the image guided analysis (2D and 3D) is getting more information about the distribution, size and form of pores in the part. Originality/value – The findings do not only refer to metallic parts but generally to all parts having a specific porosity. The study is a contribution to the American Society for Testing and Materials initiative F42 “Additive Manufacturing Technology” and especially to the subcommittee “test methods”.
Rapid Prototyping Journal – Emerald Publishing
Published: Aug 2, 2011
Keywords: Density measurement; Porosity; Archimedes method; Micrographic cross section; X‐rays; Scanning; Additive manufacturing
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