MDPI Acta Medica Okayama 2075-4701 10 5 2020 Influence of Continuous Casting Speeds on Cast Microstructure and Mechanical Properties of an ADC14 Alloy 625 EN Yoon-Seok Lee Graduate School of Natural Science and Technology, Okayama University Yuya Makino Graduate School of Natural Science and Technology, Okayama University Jun Nitta Graduate School of Natural Science and Technology, Okayama University Eunkyung Lee Department of Ocean Advanced Materials Convergence Engineering, Korea Maritime and Ocean University To improve the mechanical properties of the casting alloys, various attempts have been made to use alternative casting technologies. The Ohno continuous casting (OCC) process is a unidirectional solidification method, which leads to high-quality cast samples. In this study, the Al-Si-Cu-Mg alloy was cast at casting speeds of 1 mm/s, 2 mm/s, and 3 mm/s, by the OCC process. The aim of this study is to investigate the effects of the casting process parameters, such as casting speeds and cooling conditions, on the crystallization characteristics and mechanical properties of OCC-Al-Si-Cu-Mg alloy. Particularly, secondary dendrite arms spacing of alpha-Al dendrites in OCC samples significantly decreases with increasing casting speed. Moreover, the mean tensile strength of the samples, produced at the highest casting speed of 4.0 mm/s, is significantly higher than that for the samples produced at a casting speed of 1.0 mm/s. No potential conflict of interest relevant to this article was reported.