Surface transformation of Ti–45Al–2Nb–2Mn–1B titanium aluminide by electron beam melting

Microstructure and phase evolution on the surface of Ti–45Al–2Nb–2Mn–1B (at.%) gamma based titanium aluminide was investigated by a series of electron beam melting with different beam energies and scanning speeds. X-Ray Diffraction (XRD), Glow Discharge Spectroscopy (GDS), Optical Microscopy (OM) and Scanning Electron Microscopy (SEM) were performed to characterize the phase modification andmorphology after the