Effects of Si, Cu and Mg on the High-Temperature Mechanical Properties of Al-Si-Cu-Mg Alloy

Abstract:

The regression equation of the relationship between Si, Cu and Mg and the mechanical properties of Al-Si-Cu-Mg alloy was established according to the orthogonal experimental results. The microstructure of the Al-Si-Cu-Mg alloy was analyzed with scanning electron microscopy and energy dispersive spectroscopy. The results show that Si, Cu and Mg affected the mechanical properties (tensile strength and elongation rate) at 250 °C most significantly, minimally and negatively, respectively. The interactions between Cu, Mg and Si greatly reduced the high-temperature tensile strength owing to the formation of brittle and hard intermetallic Al₅Mg₈Cu₂Si₆ that behaved as the initial crack during stretching.

• Periodical: Advanced Materials Research (Volumes 652-654)
• Pages: 1030-1034
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.652-654.1030
• Online since: January 2013
• Authors: Wen Da Zhang, Jing Yang, Jing Zhi Dang, Yun Liu, Hong Xu
• Keywords: Al-Si-Cu-Mg Alloy, High-Temperature Mechanical Property, Orthogonal Array

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