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5157 |
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Tuesday, March 21, 2017, Hall Ford 4:35 PM Innovations I |
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Influence of electron beam process parameters on microstructure and mechanical properties of MarBN steel welds |
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Corinna Sabitzer / Institute of Materials Science and Welding, Graz University of Technology, Austria Sebastian Ufer / Welding and Joining Institute, RWTH Aachen University, Germany Coline Beal*/ Institute of Materials Science and Welding, Graz University of Technology, Austria Norbert Enzinger/ Institute of Materials Science and Welding, Graz University of Technology, Austria |
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The electron beam welding process as a high energy-density fusion technique has proven to offer welds which meets highest standards of quality and reproducibility. Therefore, a constant quality of the electron beam, in terms of beam geometry and focal plane, is required. For industrialization, transferability of the process between machines is an important precondition. Various process parameters, such as beam current, welding speed, and beam figure are varied systematically to weld a forged MarBN steel and subsequently, the welded samples are evaluated with regard to the weld seam shape and quality, their microstructure, and mechanical properties. Additionally, the DIABEAM system is used to determine the beam characteristics of the used pro- beam EBG 45-150 K14 welding equipment. Based on the obtained results the welding parameters are transferred to a 60 kW Steigerwald Ebonova double-lense electron beam welding device. In order to investigate the transferability of the process parameters, selected parameter combinations are applied on both welding plants and the shape, microstructure and micro hardness of the obtained joints are compared. |