About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys: Development and Manufacturing
|
| Presentation Title |
Micro-Tensile Evaluations of Simulated Seam and Charge Welds for Aluminum Extrusion Process Modeling |
| Author(s) |
Randall L. Bowers, Roni J. Rountree, Charles Yurgel, Wojciech Z. Misiolek, Nicholas Nanninga, Paul F. Rottmann |
| On-Site Speaker (Planned) |
Randall L. Bowers |
| Abstract Scope |
Fully bonded welds remain a challenge in the design process for porthole dies in the extrusion industry. Isothermal compression samples present a unique opportunity for systematic studies of temperature and strain rate on the formation of the weld interface to be integrated into models for extrusions. Micro-tensile testing is an ideal technique to leverage against the small sample size of isothermal compression samples. The technique has shown the capability to identify conditions of good, marginal, and bad welding conditions and the ability to distinguish localized regions of different weld integrity within the same sample. The isothermal compression sample is used to study both the clean interface of a seam weld and the contaminated interface of charge welds in the presence of lubricants and oxidation. Welds produced at temperatures of 371 °C, 426 °C, 482 °C, 537 °C and strain rates of 0.1, 1.0, 5.0, 10 s-1 show an increasing bond with temperature and strain rate apart from the highest temperature of 537 °C due to solute interactions. Oxidation of the interface fractures and disperses along the interface allowing interfacial bonding to occur between the oxide fragments. Lubrication on the interface reduces the bonding surface available for bonding to occur. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Characterization, Modeling and Simulation, Mechanical Properties |