Abstract Scope |
Abstract: Al-Si-Mg cast aluminum alloys encounter challenges in strength, especially high temperature mechanical properties. Generally, when Cu element is added to Al-Si-Mg alloy, the alloy can form more stable Cu-containing intermetallic compounds, such as θ-Al2Cu and Q-Al5Cu2Mg8Si6. As the mechanical properties of alloys are also related to grain size. Transition metals Zr and V can refine grain size. Moreover, due to the low diffusivity and solubility of Zr and V elements in Al, a fine dispersion distribution Al3M phase can be formed to resist coarsening at high temperature, which can improve the high-temperature mechanical properties. Therefore, this paper takes Al-Si-Mg cast aluminum alloy as the research object to explore the influence of Cu and Transition metals Zr and V on as-cast microstructure and mechanical properties, providing a theoretical basis for the development of automotive lightweight.
Keywords: Al-Si-Cu-Mg alloy;Transition metals ;Eutectic silicon;grain refinement;Microstructure properties |