Authors:
Martin Wolff (1), Eshwara Nidadawolu (1), Wolfgang Limberg (1), Thomas Ebel (1), Regine Willumeit-Römer (2)
1- Helmholtz-Zentrum hereon GmbH
2- Christian Albrechts Universität, Kiel
Abstract:
Recent research attests MgGd-alloys high suitability as biodegradable biomaterial due to its good strength, low stiffness and excellent biocompatibility. Moreover, novel investigations have proven that Mg-alloys can be successfully processed by binder based sintering technologies like MIM and Fused Granular Fabrication (FGF). While MIM intends to near net shape mass production, the latter one applies mainly to prototyping and production of individual patient specific implants; even with a scaffold-like strut structure inside of a dense shell.
This study compares mechanical properties and microstructures of the binary alloy Mg-6.3Gd, processed by MIM and by FGF, respectively. It is shown that today’s FGF technique achieves mechanical properties up to 217 MPa ultimate tensile strength (UTS) at 13 % elongation at fracture, comparable to the MIM processed reference material. Both processes, MIM and FGF lead to almost the same microstructure. Hence, novel FGF technique could overcome current challenges in 3D-printing of Mg-alloys.
DOI:
https://doi.org/10.59499/EP235763609