Microstructure and Properties of Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo after Electron Beam Melting Additive Manufacture

Electron Beam Melting has been used extensively for the building of parts with Ti-6Al-4V.  More recently, build parameters for the EBM of Ti-6Al-2Sn-4Zr-2Mo have been established.  For both materials, the built microstructure is anisotropic, with a characteristic columnar microstructure of prior beta grains that have transformed to a basketweave alpha platelet structure on cooling from the build temperature.  Here we report the microstructure as-built and after post-processing for parts built with challenging shapes made from both Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo.  Mechanical properties (tensile, microtensile, and fatigue) for these two alloys will be reported for different sample orientations.