About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing Fatigue and Fracture: Effects of Surface Roughness, Residual Stress, and Environment
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Presentation Title |
Micromechanical and Microstructural Characterization of Filigree Additively Manufactured NiTi Structures |
Author(s) |
Thomas Straub, Mario Schleyer, Bernhard Mueller, Sarah Fischer |
On-Site Speaker (Planned) |
Thomas Straub |
Abstract Scope |
Additive manufacturing of intricate structures has high requirements concerning manufacturing defects, especially Laser Powder Bed Fusion (LPBF) process results in structures with complex microstructure. While many studies are based on macroscopic samples in the range of several millimeters, mechanical performance of filigree structures have not been studied in great detail, especially for NiTi. This is extremely important as basis for accurate material models due to their complexity. As the mechanisms are based on high strains, the use of linear elastic models yield to wrong property predictions. In this talk, the mechanical properties of cylindrical NiTi structures with diameters in the range of 180 µm to 350 µm manufactured with LPBF will be presented. We report on our findings on micromechanical testing, non-destructive characterization (µ-CT) as well as EBSD, to analyze the effect of feature size and writing strategy on the quasi-static mechanical properties of the specimen. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |