Effects of HIP Processing on EB-DED AM Materials

Hot Isostatic Pressing (HIP) uses high temperatures and pressures to close and diffusion bond porosity and Lack-of-Fusion (LOF) defects to achieve parent metal properties in titanium castings and powder bed Additive Manufacturing (AM) processes.  More recently the process has been evaluated for application of large scale metallic AM processes, such as Electron Beam – Directed Energy Deposition (EB-DED).  This presentation will cover the impact on internal quality and mechanical properties of Ti-6Al-4V titanium alloy materials deposited using a wire feed, EB-DED process subjected to HIP processing and a conventional processing route.  The results showed a significant improvement in internal quality without detrimental effects on static or fatigue properties.