About this Abstract |
| Meeting |
2025 AWS Professional Program
|
| Symposium
|
2025 AWS Professional Program
|
| Presentation Title |
Process Envelope in FSW: Survey and Investigation of Defects Formation |
| Author(s) |
Xinrui Liu, Thomas J. Lienert, Adrian Gerlich, Patricio Mendez |
| On-Site Speaker (Planned) |
Xinrui Liu |
| Abstract Scope |
The defects that determine the operating limits in FSW have been studied through an exhaustive literature search and a comprehensive experimental matrix covering a range of practical and limiting conditions in aluminum alloys 2024, 5052, and 7075. Defects in all alloy families (not just aluminum) are classified into three types: Lack of material continuity, metallic bonds, and surface uniformity. Each defect type further branches into specific subclasses related to formation processes. Resulting properties and reliable detection methods are discussed. The influence of these defects on the weld properties are studied and known solutions are summarized. Simultaneous bead-on-plate experiments and analysis of defects formation are discussed. The formation mechanism of defects including cavities and tunnels are revealed from macroscale observation to microscale characterization. The ultimate goal is to predict an approximate process envelope for FSW that is valid for metals ranging from aluminum to steel and all practical sizes and velocities and is based on a foundation of physics, not just empirical trials. |
| Proceedings Inclusion? |
Undecided |