Mechanism-based characterization of the fatigue and corrosion fatigue properties of addtively manufactured TPMS lattice structures under physiological conditions

• Applicant: Professor Dr.-Ing. Frank Walther
• Subject Area: Mechanical Properties of Metallic Materials and their Microstructural Origins ; Biomaterials
• Term: since 2022
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 449916462

The aim of the 2nd funding phase is the in vitro characterization of additively manufactured magnesium lattice structures of WE43 in order to investigate their deformation and damage behavior under mechanical-corrosive stress. Building on methods from the first funding phase, these test methods will initially be transferred to 2D WE43 structures and then extended to more complex 3D structures. The aim is to use innovative short-term methods to individually adjust the degradation process and thus be able to specifically analyze and control the release of hydrogen. In addition, innovative in situ methods will be used to compare in vitro and in vivo data in order to reduce the number of animal experiments. The overarching research question is aimed at the patient-specific adaptation of the material properties of WE43 to ensure stability and functionality during the regeneration phase. To answer this question, four research priorities are being addressed, which deal with the targeted adjustment of the microstructure, the effect of coating systems on functionality and stability, the development of innovative short-term testing methods and the expansion of fracture-mechanical durability approaches.

• DFG Programme: Research Units
• Subproject of: FOR 5250: Mechanism-based characterization and modeling of permanent and bioresorbable implants with tailored functionality based on innovative in vivo, in vitro and in silico methods