| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XII
|
| Presentation Title |
Mechanism of Joint Formation in Dissimilar Friction Stir Welding of Aluminum to Steel |
| Author(s) |
Amlan Kar, Todd Curtis, Bharat K. Jasthi, Grant A. Crawford |
| On-Site Speaker (Planned) |
Amlan Kar |
| Abstract Scope |
This paper highlights the influence of load-controlled experiments on heat input and corresponding improvement in mechanical properties of dissimilar friction stir lap welding (FSLW) of aluminum 6061 alloy (Al) and low carbon steel (Fe) with different thicknesses. Dissimilar welds are produced at different loads and heat input conditions. The microstructure and chemical composition of the weld interface was characterized to determine the grain morphology, deformation behavior, intermetallics compounds formation and joining mechanisms at the aluminum to steel interface. An improvement (more than 60% joint efficiency) in shear tensile properties were reported under optimized process conditions. Mechanisms associated with improved tensile properties have been identified. Mechanical mixing, formation of an intercalated structure with a reduction in intermetallic compounds, and grain refinement are considered the mechanism of dissimilar joint formation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Joining, Characterization, Mechanical Properties |