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- Title
Effect of Nano-Particle Addition on Grain Structure Evolution of Friction Stir-Processed Al 6061 During Postweld Annealing.
- Authors
Guo, Junfeng; Lee, Bing; Du, Zhenglin; Bi, Guijun; Tan, Ming; Wei, Jun
- Abstract
The fabrication of nano-composites is challenging because uniform dispersion of nano-sized reinforcements in metallic substrate is difficult to achieve using powder metallurgy or liquid processing methods. In the present study, Al-based nano-composites reinforced with AlO particles have been successfully fabricated using friction stir processing. The effects of nano-AlO particle addition on grain structure evolution of friction stir-processed Al matrix during post-weld annealing were investigated. It was revealed that the pinning effect of AlO particles retarded grain growth and completely prevented abnormal grain growth during postweld annealing at 470°C. However, abnormal grain growth can still occur when the composite material was annealed at 530°C. The mechanism involved in the grain structure evolution and the effect of nano-sized particle addition on the mechanical properties were discussed therein.
- Subjects
NANOPARTICLES; FRICTION; CLASSICAL mechanics; NANOSTRUCTURED materials; POWDERS
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2016, Vol 68, Issue 8, p2268
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-016-1991-1