Optimized Selective Laser Melting of a Zr-based Bulk Metallic Glass with the Help of Finite Element Simulations

摘要

We performed selective laser melting (SLM) of a Zr-based bulk metallic glass (BMG) and found that the amount of crystallization is highly sensitive to the SLM processing parameters. Fully glassy samples can be produced, but within a very narrow process window. Finite element thermal simulation of the SLM process was used to optimize the printing parameters, and the mechanical properties of the printed samples were characterized by microhardness and ultimate compressive strength (UCS) measurements. Optical and scanning electron microscopy techniques (SEM, EDS, EBSD), X-ray diffraction and differential scanning calorimetry (DSC) were also used to characterize the SLM processed samples. Fully glassy BMG samples were achieved with a density greater than 99% and an UCS of 1.073 GPa.