INFLUENCE OF HOT ISOSTATIC PRESSING AND SURFACE FINISH ON THE MECHANICAL
BEHAVIOUR OF TI6AL4V PROCESSED BY ELECTRON BEAM MELTING
Abstract
Electron Beam Melting (EBM) is one of a few additive manufacturing
technologies capable of making full-density functional metallic parts
realized from raw materials in the form of powders. The ability of
direct fabrications of metallic parts can accelerate product designs and
developments in a wide range of metallic-part applications, especially
for complex components, which are difficult to make by conventional
manufacturing means. To capitalize on these benefits, it must be shown
that the mechanical performances of parts produced by EBM can meet
design requirements. In this research an intensive mechanical
characterization aimed at determining static and fatigue performance of
the alloy Ti6Al4V processed by EBM has been performed. The effect of
both postprocessing treatments (HIP and surface finish) on the
mechanical behavior was evaluated by mechanical testing, microstructural
study, computed tomography analysis and fracture surface investigation.