| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XI
|
| Presentation Title |
Real-time Measurement of Friction Stir Tool Motion during Defect Interaction in Aluminum Alloy 6061-T6 |
| Author(s) |
Daniel Franke, Frank Pfefferkorn, Shiva Rudraraju, Michael Zinn |
| On-Site Speaker (Planned) |
Daniel Franke |
| Abstract Scope |
The objective of this research is to develop a fundamental understanding of the interaction between features on the friction stir tool probe and volumetric sub-surface defects formed during welding. This will guide the development of real-time defect monitoring methods that will promote process adoption in high volume and high-reliability applications. A single-head laser doppler vibrometer system was used to produce a non-contact measurement of the eccentric motion of a friction stir tool during welding. When features on the tool probe interact with voided volumes, the tool is momentarily deflected into the voided volume. The distortions in the tool position signals measured with the laser vibrometer are correlated with distortions in measured process forces and defect size. The results add understanding to the changes in forces signals that hold potential for defect monitoring and also suggest that monitoring may be possible through a position-based measurement (accelerometer) from the tool side. |
| Proceedings Inclusion? |
Planned: |