On the correlation between the morphology of α and its crystallographic orientation relationship with TiB and β in boron-containing Ti-5Al-5Mo-5V-3Cr-0.5Fe alloy

While the role of borides on the microstructure of titanium alloys has been discussed in many previous reports, this paper presents the first experimental evidence of (i) the three-dimensional geometry of α precipitates confirming their equiaxed morphology, as determined by reconstruction of serially sectioned scanning electron microscopy images; and (i) the influence of the crystallographic orientation relationship between β, TiB and α phases on the morphology of α precipitates, investigated via detailed orientation microscopy studies on a boron-containing version of the commercial Ti-5Al-5Mo-5V-3Cr-0.5Fe alloy Ti5553.