Effect of Al-5Ti-B Refiner on Microstructure of Al-5Cu Aluminum Alloy

Abstract:

By using the Olympus GX71 microscope, the effects of Al-5Ti-B addition, holding time and holding temperature on the microstructure of Al-5Cu alloy have been studied, and the influencing rules have been got. The experimental results show that the refinement effect of Al-5Ti-B is very remarkable and the grain sizes of Al-5Cu become small. The optimal parameters are as follows. The refiner addition is 2%-3%, and the holding time is 15 minutes, and the holding temperature is 720°C-740°C. When the 2%-3% Al-5Ti-B refiner is added, the Al₃Ti is fine needle shape and the precipitation phase Al₂Cu is round flake shape or reticular shape. Simultaneously, the dendrites have minimum spacing, and the microstructure becomes fine and uniform.

• Periodical: Advanced Materials Research (Volume 365)
• Pages: 89-93
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.365.89
• Online since: October 2011
• Authors: De Quan Shi, Yang Shao, Gui Li Gao, Zhi Wei Gao, Xu Dong Wang
• Keywords: Al-5Cu Aluminum Alloy, Al-5Ti-B, Microstructure, Refinement

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