Effect of Mesh Structure Topology on Dynamic Properties of 3D-Printed Al-Cu-Mg-Si Alloy
A. I. Klenov1, A. N. Petrova2, I. G. Brodova2, V. V. Astaf'ev2, E. B. Smirnov1, A. Yu. Garmashev1
1All-Russian Scientific Research Institute of Technical Physics, Snezhinsk, Russia
2Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia
Keywords: selective laser melting, mesh structures, alloy structure, strength, high-rate strain
Abstract
Dynamic properties of volume-structured samples with different topology of mesh structures made of AK6 aluminum and synthesized by selective laser melting are considered. Tests are carried out at quasistatic strain rates of 102÷103с-1 by the Kolsky method using a split Hopkinson bar. Strain diagrams are constructed, and the values of the conditional yield strength and tensile strength are determined. The results of measuring the properties of samples with different topology of mesh structures of FCC and BCC types and triply periodic surfaces of minimum energy of the gyroid type. The effect of the geometric characteristics of gyroids (cell size and wall thickness) on the strength properties of the samples is described. It is shown that gyroids have improved characteristics at the same material density. Mesh metal materials obtained by additive technology can be used in engineering to reduce structural mass and destructive high-energy mechanical effects.
|
