This research program evaluates the residual properties of 7136-T76511 aluminum extrusions joined through friction stir welding (FSW). AA 7136 is a new aluminum alloy developed by Universal Alloy Corporation for high strength aerospace applications that also demand good corrosion resistance, such as those on the Boeing 787 or the Airbus A380. Mechanical and corrosion testing were performed on the baseline material and on panels friction stir welded at 175, 225, 250, 300, 350 and 400 RPM (all other welding parameters were held constant). Mechanical test results demonstrate that the highest joint efficiency, 74%, is achieved at 350 RPM, but for each weld condition, the elongation of the welded material is significantly reduced, 50 – 75%, from the baseline value. Fracture of the tensile specimens consistently occurred on the retreating side of the weld along the interface between the heat affected zone (HAZ) and the thermo-mechanically affected zone (TMAZ), independent of the rotational speed. Examination of fracture surfaces through SEM revealed microvoid nucleation and coalescence around secondary phase particles in the microstructure, as well as numerous stepped or laminar facets characteristic to both the baseline and welded conditions. Exfoliation corrosion testing revealed a performance gradient across the weld with the weld nugget rating the poorest at EC and the heat affected zone rating the best at EA. Qualitative assessment of corrosion resistance is supported by mass loss calculations between the baseline and welded conditions.
Skip Nav Destination
ASME 2007 International Mechanical Engineering Congress and Exposition
November 11–15, 2007
Seattle, Washington, USA
Conference Sponsors:
- ASME
ISBN:
0-7918-4297-5
PROCEEDINGS PAPER
Friction Stir Welding of Aluminum 7136-T76511 Extrusions for Aerospace Applications Available to Purchase
Carter Hamilton,
Carter Hamilton
Miami University, Oxford, OH
Search for other works by this author on:
Stanisław Dymek,
Stanisław Dymek
AGH University of Science and Technology, Krako´w, Poland
Search for other works by this author on:
Marek Blicharski
Marek Blicharski
AGH University of Science and Technology, Krako´w, Poland
Search for other works by this author on:
Carter Hamilton
Miami University, Oxford, OH
Stanisław Dymek
AGH University of Science and Technology, Krako´w, Poland
Marek Blicharski
AGH University of Science and Technology, Krako´w, Poland
Paper No:
IMECE2007-41154, pp. 625-630; 6 pages
Published Online:
May 22, 2009
Citation
Hamilton, C, Dymek, S, & Blicharski, M. "Friction Stir Welding of Aluminum 7136-T76511 Extrusions for Aerospace Applications." Proceedings of the ASME 2007 International Mechanical Engineering Congress and Exposition. Volume 3: Design and Manufacturing. Seattle, Washington, USA. November 11–15, 2007. pp. 625-630. ASME. https://doi.org/10.1115/IMECE2007-41154
Download citation file:
29
Views
Related Proceedings Papers
Related Articles
Formability of Al 5xxx Sheet Metals Using Pulsed Current for Various Heat Treatments
J. Manuf. Sci. Eng (October,2010)
Circular Bulging of Aluminum-Alloy Sheet at Room and Elevated Temperatures
Trans. ASME (February,1946)
The Effect of Treatment of Powder Precursor on the Properties of Compacted Mg-4Y-3Re Alloy
J. Eng. Mater. Technol (October,2023)
Related Chapters
Investigation of Some Problems In Developing Standards for Precracked Charpy Slow Bend Tests
Developments in Fracture Mechanics Test Methods Standardization
In Situ Observations of the Failure Mechanisms of Hydrided Zircaloy-4
Zirconium in the Nuclear Industry: 20th International Symposium
Recent Developments in J Ic Testing
Developments in Fracture Mechanics Test Methods Standardization