| About this Abstract |
| Meeting |
2024 AWS Professional Program
|
| Symposium
|
2024 AWS Professional Program
|
| Presentation Title |
Exploration of High Depth-to-Width Ratio Micro-Friction Stir Welding with the Assistance of Induction Preheating on Thin Aluminum Plates |
| Author(s) |
Colton Shambaugh, Ezequiel Pessoa |
| On-Site Speaker (Planned) |
Colton Shambaugh |
| Abstract Scope |
In the autogenous joining process of thin 6061-T6 aluminum plates, the issue of solidification cracking is a significant challenge faced by fusion processes. Solid-state welding processes such as Friction Stir Welding (FSW) and Micro-FSW provides a potential solution for solidification cracking due to the absence of a liquid phase and solidification process during welding. Compared to Laser Beam and GTA welding, the depth-to-width ratio (DWR) of FSW welds is typically less than half that of welds produced using fusion processes and Micro-FSW’s ratios are even lower. The tool geometry is often disproportionally wide and relatively shallow in cross-sectional profile. Through experimentation on High-DWR tooling it was found that smaller tooling shoulders reduce heat generation, producing less plasticized material and greater forces on the pin. This geometry causes shearing of the pin from the rest of the tool. To bridge the DWR gap between autogenous fusion processes and friction stir welding, the utilization of an induction preheating method and improved tooling design were conducted to create DWR ratios greater than 0.4. Tooling designs were tested to find a suitable geometry with the result being four improved geometry tools of DWR’s: 0.25, 0.5, 0.75, and 1.0. In conjunction with a custom induction heating coil for preheating in front of the tool, successful welds were produced. A variety of travel speeds and preheat temperatures were tested with the improved tools to find the limits of High-DWR Micro-FSW on thin aluminum plate. |
| Proceedings Inclusion? |
Undecided |