Mechanical behavior of CuZrAl metallic glass scaffolds fabricated by selective laser melting

Abstract

Selective laser melting (SLM) was used to manufacture the CuZrAl metallic glass (MG) scaffolds containing body-centered cubic and face-centered cubic combined lattices (F2BCC) with straight and curved struts, and the effects of the lattice structures on the mechanical behavior were examined. The findings show that the curved struts significantly improve the compressive ductility by 122 % and the energy absorption by 106 %. The curved struts can effectively prevent catastrophic shear fracture and delay the fracture – mainly due to the relief of strain concentrations. The results from this work prove that it is possible to effectively improve the ductility and toughness of SLM MG components by designing a suitable lattice structure.