supplementary information for: Bridging sustainable scrap metallurgy and aluminum crossover alloys

Large area SEM/BSE micrographs of the microstructure of samples with high Fe content and varying Si content (low and high) in both the as-cast and homogenized conditions大型扫描电子显微镜/背散射电子显微镜（SEM/BSE）显微图像，展示了高铁含量和不同硅含量（低和高）的样品微观结构，包括铸态和均质化状态下的图像。