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We analyzed secondary emission current and X-Ray radiation dependency on the beam’s position along the joint during Electron Beam Welding of similar and dissimilar materials. We established that those characteristics were identical if the welding rim melting was absent. The characteristics are of extreme nature. During the welding of similar materials, the dependency minimum corresponds with the precise alignment of the beam’s position and the joint. During the welding of dissimilar materials, the minimum of the secondary emission current shifts towards the material with the lowest coefficient of the secondary emission and the minimum of the X-ray radiation shifts towards the material with the lowest atom number. The similarity of the characteristics is explained by the fact that the appearance of the secondary emission and the X-ray radiation is the result of the electron beam’s interaction with the material of the welded parts. Therefore, we can use the same mathematical tool to analyze the dependencies and joint tracking devices can be designed with unified hardware and software applications.

Analysis of the secondary emission current and X-ray radiation dependency on the beam’s position along the joint during electron beam welding