About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques
|
| Presentation Title |
In-situ 3D Digital Image Correlation and Thermal Imaging for Process Monitoring in Laser Directed Energy Deposition (L-DED) |
| Author(s) |
James C. Haley, Brian Jordan, Ross Cortino, Ryan Dehoff, Vincent C Paquit |
| On-Site Speaker (Planned) |
James C. Haley |
| Abstract Scope |
In laser-based metal Additive Manufacturing (AM), detrimental part distortion is a natural consequence of the accumulated stresses and strains from the complex, time variant thermal field produced by the scanning laser. In this work, these distortions are directly quantified through in-situ, real time 3D Digital Image Correlation (DIC), and are mapped concurrently with the thermal field measured from infrared imaging. Thermal expansion and contraction of deposited material layer-to-layer produces variable degrees of hot and cold work, which competes with annealing from subsequent laser passes to produce the final microstructure of the deposited component. The diverse influences of different geometries and scan patterns on the strain evolution of a component are explored in detail. 3D DIC with infrared imaging provides an inexpensive and deep dataset for model and control algorithm development while maintaining a high degree of independence from part geometry and build size. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |