Abstract
Time-of-flight neutron diffraction was used to investigate the texture changes in friction stir-processed (FSP) 6061-T6 aluminum alloy plates. Two different specimens were prepared with the purpose of separating the effects of frictional heating and severe plastic deformation on the changes of the preferred orientation in the as-received rolled plates: a plate processed with both stirring pin and tool shoulder, i.e., a regular FSP plate subjected to both severe plastic deformation and frictional heating (Case 1); and a plate processed only with the tool shoulder, i.e., subjected mainly to frictional heating (Case 2). The diffraction peak intensities provide insights into the texture variations at various locations across the centerline and through the thickness of the FSP plates. Comparison of the texture variations between Cases 1 and 2 clearly shows that the severe plastic deformation from the stirring pin affects the preferred orientation during the FSP, while heating alone from the tool shoulder has little effect.
Original language | English |
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Pages (from-to) | 3871-3882 |
Number of pages | 12 |
Journal | Acta Materialia |
Volume | 54 |
Issue number | 15 |
DOIs | |
State | Published - Sep 2006 |
Funding
This work was supported by the NSF International Materials Institutes (IMI) Program under contract DMR-0231320. This work has benefited from the use of the Los Alamos Neutron Science Center at the Los Alamos National Laboratory. This facility is funded by the US Department of Energy under contract W-7405-ENG-36. The research was also sponsored by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of FreedomCAR and Vehicle Technologies, as part of the High Temperature Materials Laboratory User Program, Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the US Department of Energy under contract number DE-AC05-00OR22725. The authors thank Dr. Y.D. Wang for help with the texture analysis and Mr. A. Frederick, Mr. T. Sisneros, and Mr. T. A. Saleh for their help during the experiments.
Keywords
- Aluminum alloys
- Friction stir processing
- Neutron diffraction
- Texture