Effect of pouring time on microstructure and mechanical properties of centrifugal cast Ti-46Al alloy tubes

• Prolonging pouring time in vacuum centrifugal casting transforms coarse columnar grains into refined equiaxed grains in Ti-46Al alloy tubes. • Optimal pouring time of 6 s at 1,600 °C and 800 r·min-1 yields tensile strengths of 650 MPa at room temperature and 705 MPa at 800 °C. • ProCAST simulations effectively predict solidification behavior and microstructure evolution under high gravity conditions. • The study provides a viable method for producing high-performance TiAl alloy tubes for aerospace applications.