Abstract
In comparison to construction metals, uranium has poor mechanical properties with variations in metallic texture known to have a considerable influence on mechanical properties. The current work examines the changes in microstructure and grain orientation of uranium metal resulting from electron beam (EB) welding using electron backscatter diffraction (EBSD) measurements combined with focused ion beam (FIB) milling and ion induced secondary electron microscopy. The microstructure of the metal away from the weld was compared with that observed within the fusion zone (FZ) and heat affected zone (HAZ) of the weld. Results indicate significant recrystallisation of the metal within the fusion zone and varying amounts of recrystallisation across the HAZ. The presence of stress features in the microstructure of the FZ and HAZ indicate residual stresses resulting from the welding process.
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