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Dynamic compression of 3D printed metallic microstructures with in-situ X-ray imaging

: Jäcklein, Martin; Kappe, Konstantin; Pfaff, Aron; Bierdel, Marius; Hoschke, Klaus; Wickert, Matthias; Riedel, Werner; Forster, Jacob; Eakins, Daniel; Escauriza, Emilio; Smith, Liam; Rack, Alexander

Major, Zoltan (Ed.) ; Johannes Kepler Universität, Linz:
10th International Symposium on Impact Engineering, ISIE 2019. Proceedings : July 2-5, 2019, Gmunden, Austria
Linz: Trauner, 2019
ISBN: 978-3-99062-576-7
ISBN: 3-99062-576-4
International Symposium on Impact Engineering (ISIE) <10, 2019, Gmunden>
Conference Paper
Fraunhofer EMI ()
additive manufacturing; laser beam melting; mesostructure; lattice structure; auxetic structure; dynamic compression; numerical simulation; in-situ X-ray imaging

Additive manufacturing (AM) is an attractive approach for the design and production of complex structures not possible to realize with conventional methods. While the dynamic mechanical response of bulk material is object of extensive investigation, the dynamic behavior of mesostructured material is lacking attention. In this study, a series of different mesostructures, such as lattice and auxetic structures, was designed and additively manufactured in Ti-6Al-4V by laser beam melting (LBM). Dynamic compression tests at velocities around 150 – 360 m/s were conducted at selected samples using a gas-gun. InsituX-ray imaging provided image data showing an influence of the design of the mesostructure on its failure behavior. Numerical simulations of the impact were compared to the experiments demonstrating a promising accordance. The results enable improved numerical simulation models enhancing their prognostic capacity. Moreover, the findings support the development of design approaches considering the structure-dependent failure behavior.