Inhomogeneous microstructure in highly alloyed cast TiAl-based alloys, caused by microsegregation

This paper describes the segregation behaviour of two TiAl alloys containing refractory metal additions. This includes the coring of the refractory metal additions in the β dendrites and the formation of large peritectic αp in the interdendritic liquids. The origin, nature, distribution and processing influence of such inhomogeneity are discussed.