Home

MAPPING THE TRAY OF ELECTRON BEAM MELTING (EBM) Ti-6Al-4V SAMPLES - PROPERTIES AND MICROSTRUCTURE


  Eitan Tiferet [1,2]  ,  Moshe Ganor [1]  ,  Dennis Zolotaryov [3]  ,  Andrey Garkun [3]  ,   Michael Chunin [2]  ,  Ofer Tevet [1]  ,  Ori Yeheskel [1]  
 [1] Materials Department, Nuclear Research Center Negev, Beer-Sheva, Israel
[2] Additive Manufacturing R&D Center, Rotem Ind., Mishor Yamin, Israel
[3] Institute of Metals, Technion-Israel Institute of Technology, Haifa, Israel

We present a study on the dependency of physical properties (density, elongation, tensile strength and fatigue limit) and microstructure on the geometrical location in a tray of powder bed EBM. It was found that the mechanical properties slightly depend on the order of melting. It seems that when applying high percentage (above 50%) of melted surface, there are density variations and the mechanical properties deteriorate near the edges of the tray. Nevertheless, upon applying HIP (Hot Isostatic Pressure) post process, samples can reach higher density accompanied by higher elongation with uniform strength and fatigue limits.