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Abstract: For this paper the influence of the shielding gas itself as well as the feeding method on austenitic welding joints was examined with thin sheets frequently used in the household appliance industry. The composition of the shielding gas mixture with active and/or inert gases was varied in the examination, and the effect on the weld seam could be made clear. By comparing different shielding gas feeding concepts, the process was optimized with regard to seam formation. Moreover, the influence of oxygen on the seam shape was examined in the deep welding regime on a specific example. [Copyright &y& Elsevier]

Abstract: Efficiency in laser based manufacturing is often considered as the wall-plug-efficiency of the laser source itself. Nevertheless the overall efficiency during laser welding has to be reviewed as a sum of the laser source and the process design (i.e. material properties etc.) as well. The term of heat, which is dissipated in the base material due to heat conduction is often not contemplated, even if this term can reach very high values. The ration of heat dissipation in the base material to the total heat input reduces with increasing processing speed. In order to reach higher welding speeds, higher intensities are considered and investigated for laser welding. As a result, process efficiency can rise over 10% due to narrower spots and higher speeds. The applicability in terms of mechanical properties etc. is further discussed in the paper. [Copyright &y& Elsevier]

Abstract: The main focus of the article is on the reflection of welding with small foci. Questions regarding efficiency, the chance of increasing speed and thus reducing cycle time in production are particular key subjects. Furthermore, examples of applied parts will be presented and evaluated. Moreover, a correlation will be shown between the process and the achieved mechanical properties on the example of the tensile shear test. [ABSTRACT FROM AUTHOR]