Microstructural Properties of Gamma Titanium Aluminide Manufactured by Electron Beam Melting

摘要

In recent years, Electron Beam Melting (EBM) has matured as a technology for additive manufacturing of dense metal parts. The parts are built by additive consolidation of thin layers of metal powder using an electron beam. With EBM, it is possible to create parts with complex geometries unable to be fabricated by other methods, examples being fine network structures and internal cavities. The process is run in vacuum, which makes it well suited for materials with a high affinity to oxygen, such as y. titanium compounds. We present material data from a recently conducted study of the effect of EBM process melt strategy on y-titanium aluminide, Ti-48A1-2Cr-2Nb. The investigation includes microstructural characterization, grain size measurement and tensile testing.