About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Controlling AM Microstructures through In-situ Laser Annealing and Rapid Post-processing Optimization |
| Author(s) |
Kaila Morgen Bertsch, Connor Rietema, Jennifer Glerum, John Roehling, William Smith |
| On-Site Speaker (Planned) |
Kaila Morgen Bertsch |
| Abstract Scope |
Current methods for controlling metal AM microstructures (and therefore properties) can be limited, e.g. by native process parameters, or prohibitively slow, e.g. empirical determination of post-processing. To reduce these constraints, a framework for controlling microstructures was developed using in-situ annealing and rapid post-mortem heat treatment screening. To control phases and microstructure layer-by-layer during printing, we developed a secondary diode laser annealing system for powder-bed fusion. Ti-6Al-4V microstructures were controlled as a function of depth by pulsing the diode laser at different frequencies. For alloys that cannot be annealed in-situ, a Gleeble thermomechanical simulator was used to rapidly screen post-process heat treatments. Resistive heating was used to apply a temperature gradient to AM components to evaluate microstructural evolution and phase transformations across a range of annealing temperatures in a single sample, eliminating a critical bottleneck. Together, these developments create a framework for printing novel alloys in an agile, efficient way. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |