Abstract
ABSTRACT In this paper, the electron beam welding of Zhs6u superalloy is modelled numerically by a combined heat input model. Also the welding process was performed experimentally on Zhs6u samples to validate the numerical results. The results showed that weld pool shape obtained by the numerical model was in accordance to the experimental analysis of the weld cross section. Also the numerical model was able to predict the susceptibility to formation of liquation cracks in the heat-affected zone based on the study of the temperature gradient during the solidification stage. It was found that by increasing the heat input the temperature gradient decreases and it takes more time for the workpiece to solidify which decreases the susceptibility to liquation crack formation.
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