| Abstract: |
Electron beam welding has been applied to various industries, in particular, automotive, aerospace an microelectronics. The focused electron beam is one of the highest power density sources and thus high processing speeds are possible and narrow welds can be produced accurately.
An important problem in the electron beam welding is the control over the quality of the welding seams. The principal parameters that need to be monitored during electron beam welding, for example, include weld pool geometry (width and penetration), defects or discontinuities (cracking, porosity, etc.), micrstructure(strengh), residual stresses, and temperature.
This paper presents results from applications of infrared/ultraviolet (IR/UV) and optical sensing (charged coupled devices) tecniques for monitoring the electron-beam welding process.
The advantages and limitations of these techniques are also discussed. Results from the study of the effect of electron beam parameters on the heat input and weld bead profile are presented as well.
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