Topic:　Characterization of Ti-6Al-4V Cellular Foams Fabricated by Additive Manufacturing Using Electron Beam Melting (31, May, 14:00-15:30)

Speaker:　Prof. Dr. Lawrence. E. Murr

　　　Materials Research & Technology Institute
　　　　　The University of Texas at Elpaso, USA

Time:　14:00-15:30, (Mon.) 31, May, 2010

Venue:  Room 403, R&D building, IMR CAS

Welcome to attend!

Abstract

Ti-6Al-4V open cellular foams were fabricated by additive manufacturing using electron beam melting (EBM). Foam models were developed from CT-scans of aluminum open cellular foams and embedded in CAD for EBM. These foams were fabricated with solid cell structures as well as open (or hollow) cell structures and exhibit tailorable stiffness and strength. The strength in proportion to the measured microindentation hardness is as much as 40% higher for hollow or open cell (ligament) structures in contrast to solid, fully dense EBM fabricated components. Plots of relative stiffness versus relative density were in good agreement with the Gibson-Ashby model for open cellular materials. Stiffness or Young’s modulus values measured using a resonant frequency – damping analysis technique were found to vary inversely with porosity especially for solid ligament, open cellular structure foams. These foams exhibit the potential for novel biomedical, aeronautics, and automotive applications.