The degree of supersaturation is a factor that influences the Al2O3 inclusion characteristics in steel. The influence of the addition of a large amount of Al in the molten steel on the formation, growth and morphology of Al2O3 inclusions was investigated by laboratory scale experiments. Consecutive steel samples were taken during the deoxidation process and subjected to chemical analysis (ICP-AES), automated image analysis (AIA) and scanning electron microscopy (SEM) assessment with respect to the extracted inclusions. The characterisation and quantification of Al2O3 particles show different growth processes, leading to variations in particle size distribution as well as in the morphology.
Van Ende, M.-A., Guo, M. X., Zinngrebe, E., Dekkers, R., Proost, J., Blanpain, B., & Wollants, P. (2009). Morphology and growth of alumina inclusions in Fe-Al alloys at low oxygen partial pressure. Ironmaking & Steelmaking : processes, products and applications, 36(3), 201-208. https://doi.org/10.1179/174328109X401550 (Original work published 2009)