Study of the Crystallization Morphology of Ti-1023 Alloy Ingot

Abstract:

In this paper, a numerical model was established using the finite volume method to establish a corresponding relationship between the simulated temperature and flow fields and the actual solidification structure of the ingot. The grain growth direction and grain morphology transformation of the industrial-scale Ti-1023 alloy ingot were investigated. The results indicated that the predicted grain growth direction (angle) of columnar grain at the bottom and edges of the ingot coincides with the actual by more than 90% through temperature gradient components and ; The G-R (temperature gradient-solidification rate) diagram was plotted. There is an obvious boundary between equiaxed and columnar grains, and the critical parameters G* for columnar-equiaxed crystal transformation varies under different melting processes.