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The electron beam technology offers a wide range of possibilities for the use with industrial production processes. In addition to welding applications the fast beam deflection with electromagnetic coils can be used within additive layer manufacturing to gain a higher scanning speed and to realize new deflection figures compared to laser based systems. Therefore, the electron beam sintering exhibits a high application potential in order to achieve higher build-up rates. After explaining the functional principle and the relating process steps the examination of different scanning strategies is presented. By means of part analysis and visual observation, determining effects could be identified. In the following, the analysis of temperature profiles by means of thermal simulation was carried out in order to optimize the sintering of one layer. Based on these results the adaptation of process parameters could be derived. It is shown that the scanning strategies have a significant influence on the process and the part quality respectively.

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Inhalt: Reibrührschweißen wird zunehmend im Flugzeugbau und der Raumfahrt als Fügemethode für hochfeste Aluminiumlegierungen genutzt. Die dabei entstehenden Eigenspannungen können sich ungünstig auf das Betriebsverhalten auswirken und müssen in der Auslegung der Bauteile berücksichtigt werden. Für Eigenspannungsanalysen werden verständlicherweise keine kompletten Bauteile herangezogen, sondern bevorzugt Probekörper aus größeren, bauteilnahen Komponenten. Die Frage ist, ob der Eigenspannungszustand in diesen Komponenten und Probekörpern demjenigen im tatsächlichen Bauteil nahe kommt oder zumindest eine konservative Bewertung des Eigenspannungseinflusses ermöglicht.

Abstract. Friction stir welding (FSW) is a well-known technique which allows joining of metal parts without severe distortion. Because FSW involves less heat input relative to conventional welding, it may be assumed that cutting specimens from larger friction stir welded components results in a negligible redistribution of residual stresses. The aim of the investigations was to verify these assumptions for a welded aluminum plate and a circumferentially-welded aluminum cylinder. Strain gage measurements, X-ray diffraction and the incremental hole drilling method were used.