National Research Council of Canada. NRC Institute for Aerospace Research
Ti–6Al–4V; electron beam welding; laser scanning confocal microscopy
Processing conditions for manufacturing Ti–6Al–4V components by welding using an electron beam source are known to influence the transformation microstructure in the narrow fusion and heat-affected zones of the weld region. This work examined the effect of multiple-sequence welding on the characteristics of the transformed beta microstructure, using laser scanning confocal microscopy to resolve the Widmanstätten alpha–beta structure in the fusion zone. The evolution in the alpha interlamellar spacing and plate thickness with processing was then related to microhardness measurements in the weld region.