| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Optimal Planning and Control for Microhardness Demonstrated in Thin-walled Steel Parts Made via Wire Arc Additive Manufacturing |
| Author(s) |
Mikhail Khrenov, P. Chris Pistorius, Sneha Prabha Narra |
| On-Site Speaker (Planned) |
Mikhail Khrenov |
| Abstract Scope |
High power inputs and changing geometries induce highly transient and dynamic thermal histories over parts produced by Wire Arc Additive Manufacturing (WAAM). This, in turn, results in uncontrolled in-situ heat treatments and varying properties, such as differences in hardness, across the final part. This work proposes and demonstrates the application of optimal planning techniques, utilized to great effect in fields such as aerospace engineering and robotics, to control these outcomes. The dynamics of temperature and hardness evolution are modeled using physics-based techniques informed by in-situ data. These are used to solve a joint trajectory optimization problem for desired outcomes. State estimation and feedback control is employed to track the resultant solutions during fabrication. Control of hardness by the combined system is experimentally verified. This work has the potential to advance the use of WAAM for mission-critical parts, while also laying the foundation for similar developments in large-scale additive manufacturing broadly. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |