Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden
For manufacturing implants customized to the patient’s need, additive manufacturing (AM) has a high potential. Hence, the processing of biodegradable metallic materials to fabricate new temporary implants with complex geometry and with adjusted mechanical and (bio)chemical properties is currently drawing increasing attention. Thereby, laser powder bed fusion (LPBF) – as a dominating metal AM process – presents an attractive technology. Regarding biodegradable materials, Fe-Mn-based alloys are promising candidates, besides Mg- or Zn-based systems, due to the broad range of mechanical properties, the high mechanical integrity during degradation as well as an excellent processability. Especially, the processing of Fe-Mn-C-based alloys via LPBF is very attractive because very filigree structures can be realized due to their high strength. Such filigree structures are needed for e.g. stents to open up clogged vessels. Furthermore, owing to the LPBF processing, a relatively homogenous microstructure can be achieved leading to the desired uniform degradation.
Abstract
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