About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Microstructure-Sensitive Design and Advanced Characterization: An MPMD/SMD Symposium Honoring David T. Fullwood
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| Presentation Title |
Measurement of Flow Stresses for High Strain Rate, High Temperature Processes: Application to Friction Stir and Rotary Friction Welding |
| Author(s) |
Michael P. Miles, Tracy W. Nelson, David J. Prymak, Bryce L. Harward, Kennen Brooks, Bryan Ramos Gonzales |
| On-Site Speaker (Planned) |
Michael P. Miles |
| Abstract Scope |
Finite element models of friction stir welding (FSW) and rotary friction welding (RFW) typically rely on constitutive laws calibrated with flow stress data from hot compression or hot torsion testing. However, strain rates and shear intensity in these tests are far lower than those in the shear zone adjacent to a FSW tool or at an RFW interface, and the coarser grain structures they produce yield flow stresses that are far too high for enabling accurate model predictions. We present a high-pressure shear (HPS) testing approach for measuring flow stresses at strain rates and temperatures representative of these processes, where continuous dynamic recrystallization generates fine-grained microstructures. Incorporating HPS-derived flow stresses substantially improved model predictions for FSW of AA 2219 and RFW of Inconel 718. Microstructural characterization of both alloys, including grain size and texture, is presented for tests conducted across a range of high strain rates and temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Aluminum, High-Temperature Materials |