The present work deals with the development of a laser beam and powder bed based multi-material additive manufacturing processes. Based on this process a multi-material part, consisting of a substrate material and a high wear resistant coating material, has been fabricated. Therefore a process model has been elaborated, to combine a two-dimensional recoating unit and a selective powder-recoating mechanism. The selective recoating mechanism uses as active principle the advantages of powder flowability. Hence the nozzle geometry and the attitude of the powder grains have been investigated. The process performances as well as the part properties have been evaluated by means of physical, chemical and technological characterization methods. Finally the economic efficiency of multi-material processing has been proved on the basis of industrial examples of use.
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The present work deals with the development of a laser beam and powder bed based multi-material additive manufacturing processes. Based on this process a multi-material part, consisting of a substrate material and a high wear resistant coating material, has been fabricated. Therefore a process model has been elaborated, to combine a two-dimensional recoating unit and a selective powder-recoating mechanism. The selective recoating mechanism uses as active principle the advantages of powder flowab...
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