| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
Effects of Processed Microstructure with Defects on Fatigue Strength and Damage Tolerance of Additively Manufactured Metals |
| Author(s) |
Sebastian Stammkötter, Mirko Teschke, Alexander Koch, Frank Walther |
| On-Site Speaker (Planned) |
Frank Walther |
| Abstract Scope |
The fatigue strength and damage tolerance in technical applications can be affected by microstructure with defects and surface roughness of additively manufactured metals and structures. Application-orientated assessment strategies enable the detailed analysis and monitoring of process-related influences on the fatigue performance. In intermittently interrupted tests the interaction between microstructure with porosity and crack initiation is quantitatively determined. Different metals for aerospace and biomedical applications were evaluated in terms of the effect of defects, building directions and stress ratios. Results were correlated with effective defect size using fracture mechanical approaches. In the DFG research unit 5250 the mechanism-based characterization of complex triply periodic minimal surface (TPMS) lattice structures for patient-specific implants with tailored functionality is focused. For minimization of stress shielding, the stiffness is adapted to the bone using porous structures. Using analysis and measurement techniques like µCT and DIC, fatigue failure was localized, resulting in local defect-related S-N (Woehler) relationships. |
| Proceedings Inclusion? |
Planned: |