Study of the crystallization morphology of VT3-1 alloy during VAR

In this paper, we consider the crystallization morphology formation of VT3-1 titanium alloy in the process of vacuum arc remelting (VAR). Based on experimental data obtained by the method of autoradiography, we numerically determine remelting parameters such as the temperature gradient G at the solidification front and its velocity V. Since practically all kinds of morphology of the crystallization microstructure of metal systems are present in an ingot (planar front, cellular, cellular-dendritic, and dendritic structures), we consider two simple models of transition from one structure to another. The models greatly depend on the parameters G and V. In this paper, the liquidus curve slopes for the alloying elements of VT3-1 alloy are determined and a morphology map is constructed. Also, the results are compared with those obtained earlier by other authors.