Evaporation of a substance from the surface of a high-strength aluminum alloy during electron beam welding

The evaporation of atoms of high-strength aluminum alloy type 1370 from the weld and the hot zone during electron beam welding of products is investigated. A mathematical model is proposed to predict the spatial distribution of temperatures and characteristics of mass loss of products depending on welding conditions. Experimental studies of these processes have been made. The results of calculations and experiments are compared. The structure of phase transformations is studied. It is established that the evaporation intensity almost linearly depends on the beam current density and its scanning speed. Experiments have shown that evaporation is active and can significantly affect the composition of the weld (mainly light elements evaporate), and its mechanical characteristics.

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