Effect on P-Element Modification on Microstructure of Al-Based Alloy

Abstract:

To develop high wear-resistant protective materials for magnesium alloy, high-silica Al-based alloy modified via P-element was fabricated by DC casting method. Microstructure of ingot samples was observed by using optical microscopy (OM), etc. The results demonstrated that Al-Si-0.01%P alloy with unique microstructure and without defects such as voids and rarefaction might be generated by processing control. Owing to modification by Al-P interalloy, primary crystal silicon phase in hypereutectic Al-Si alloy were refined effectively. Its size in Al-18Si-0.01%P alloy decreased from 50μm to 20μm, and distributed uniquely than that in Al-18Si alloy. Al-P acted as heterogeneous core of primary crystal silicon phase, which was the main mechanism for Al-P interalloy to modify primary crystal silicon in Al-Si alloy.

• Periodical: Applied Mechanics and Materials (Volumes 556-562)
• Pages: 620-623
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.556-562.620
• Online since: May 2014
• Authors: Xiao Ming Wang*, Sheng Zhu, Jian Zhong Cui, Qing Chang, Qing Feng Zhu
• Keywords: Al-Based Alloy, Microstructure, Modification Mechanism, Modification Treatment, P-Element

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