Plastic behavior of the α′ phase in Ti-6Al-4V alloys

Abstract Plastic deformation of α ′ martensite phase in Ti-6Al-4V alloy is investigated by performing tensile tests in a Scanning Electron Microscope (SEM). Electron Backscatter Diffraction (EBSD) analysis is used to determine the slip modes activated in α ′ martensite depending on the crystallographic orientation of the laths. As in the α phase, mostly basal and prismatic slip modes are identified. The weighted Schmid analysis applied using the critical resolved shear stress (CRSS) values of the α phase performs well in the description of the behavior of the α ′ phase.