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    Item type:Publication, Access status: without files ,
    Potentials of Metal Binder Jetting Process Chains for Medical Parts
    (European Powder Metallurgy Association (EPMA), 2022-10)
    Janzen, Kevin
    ;
    Groß, Patricia
    ;
    Imgrund, Philipp
    ;
    Emmelmann, Claus
    Additive manufacturing (AM) of metal components offers enormous potential for patient-specific medical applications. Endoprostheses such as artificial hip joints are already being successfully manufactured using the laser or electron powder bed fusion (L-/E-PBF) process. Recently, however, new sinter-based AM processes have increasingly come into focus. Metal binder jetting promises lower manufacturing costs with the same or higher geometrical freedom and accuracy as L- or E-PBF. Nevertheless, concrete industrial application examples are still pending. In this paper, a possible process chain and its influences for the MBJ production of Ti-6Al-4V parts is therefore presented and investigated. For this purpose, requirements for the mechanical and chemical properties are compiled, costs and cost structure as well as data preparation are investigated and compared to L-PBF.
    Publicationtype: Conference Paper
      60
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    Item type:Publication, Access status: with files ,
    Design Guidelines For Green Parts Manufactured With Stainless Steel In The Filament Based Material Extrusion Process For Metals (MEX/M)
    (European Powder Metallurgy Association (EPMA), 2022-10)
    Asami, Mohammad Karim
    ;
    Herzog, Dirk
    ;
    Bossen, Bastian
    ;
    Geyer, Leon
    ;
    Klemp, Clarissa
    Filament-based material extrusion (MEX/M) presents a rapid and inexpensive alternative to e.g. metal injection molding, particularly for prototype production. The filament consists of metal powder in a plastic matrix and is melted and applied layer by layer until a so-called green body is created. These green parts are subsequently debinded and sintered at high temperatures to form a dense metal component. It is crucial to identify the material-specific and process-specific limits in order to be able to manufacture true to size. This paper therefore develops design guidelines for the MEX/M process for green part manufacturing for the widely used austenitic stainless steel AISI 316L (1.4404). Basic geometrical features such as walls, boreholes and overhangs are studied and influencing factors on the dimensional accuracy are assessed. Based on the results, recommendations for part design are presented.
    Publicationtype: Conference Paper
      117  212