| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XI
|
| Presentation Title |
Low-force Friction Surfacing for Crack Repair in 304L Stainless Steel |
| Author(s) |
Hemant Agiwal, Hwasung Yeom, Kumar Sridharan, Kenneth A. Ross, Frank E. Pfefferkorn |
| On-Site Speaker (Planned) |
Hemant Agiwal |
| Abstract Scope |
The objective of this research is to evaluate low-force friction surfacing as a means for repairing cracks in 304L stainless steel canisters. The motivation for reducing process forces is to allow for portability of the system to perform in-field repairs. 304L austenitic stainless-steel rod was deposited over a substrate of the same alloy using a CNC machine tool in position control mode while observing the process forces, spindle torque, and temperature on the back side of the repair. Friction surfacing was performed at spindle speeds up to 20,000 RPM. A fine grain structure with some martensitic transformation was observed in the plastically deformed material. Friction surfacing was performed on simulated cracks followed by helium leak testing to evaluate the ability to create a gas-tight repair. Closing of cracks near the interface of substrate and deposit was observed after microstructural analyses. |
| Proceedings Inclusion? |
Planned: |