[en] Despite the fact that additive manufacturing (AM) techniques allow to manufacture complex porous parts with a controlled architecture, differences can occur between designed and as-produced morphological properties. Therefore this study aimed at optimizing the robustness and controllability of the production of porous Ti6Al4V structures using selective laser melting (SLM) by reducing the mismatch between designed and as-produced morphological and mechanical properties in two runs. In the first run, porous Ti6Al4V structures with different pore sizes were designed, manufactured by SLM, analyzed by microfocus X-ray computed tomography (micro-CT) image analysis and compared to the original design. The comparison was based on the following morphological parameters: pore size, strut thickness, porosity, surface area and structure volume. Integration of the mismatch between designed and measured properties into a second run enabled a decrease of the mismatch. For example, for the average pore size the mismatch decreased from 45% to 5%. The demonstrated protocol is furthermore applicable to other 3D structures, properties and production techniques, powder metallurgy, titanium alloys, porous materials, mechanical characterization, tomography. (C) 2011 Elsevier B.V. All rights reserved.
Disciplines :
Materials science & engineering
Author, co-author :
Van Bael, S.; Katholieke Univ Leuven, Dept Mech Engn, Div Prod Engn Machine Design & Automat, B-3001 Louvain, Belgium.
Kerckhofs, Greet ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Génie biomécanique
Moesen, M.; Katholieke Univ Leuven, Dept Met & Mat Engn, B-3001 Louvain, Belgium.
Pyka, G.; Katholieke Univ Leuven, Dept Met & Mat Engn, B-3001 Louvain, Belgium.
Schrooten, J.; Katholieke Univ Leuven, Dept Met & Mat Engn, B-3001 Louvain, Belgium.
Kruth, J. P.; Katholieke Univ Leuven, Dept Mech Engn, Div Prod Engn Machine Design & Automat, B-3001 Louvain, Belgium.
Language :
English
Title :
Micro-CT-based improvement of geometrical and mechanical controllability of selective laser melted Ti6Al4V porous structures
Publication date :
2011
Journal title :
Materials Science and Engineering: A: Structural Materials: Properties, Microstructures and Processing
ISSN :
0921-5093
eISSN :
1873-4936
Publisher :
Elsevier Science Sa, Lausanne, Switzerland
Volume :
528
Issue :
24
Pages :
7423-7431
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
KU Leuven - Catholic University of Leuven IWT - Agency for Innovation by Science and Technology
Commentary :
This work is funded by Quest (Quantitative Engineering of Skeletal Tissues) K.U.Leuven IDO 05/009 and is part of Prometheus, the Leuven Research & Development Division of Skeletal Tissue Engineering of the Katholieke Universiteit Leuven: www.kuleuven.be/prometheus. Maarten Moesen and Greet Kerckhofs were funded by the agency for Innovation by Science and Technology in Flanders (IWT/OZM/080436 and IWT/OZM/090655).
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