heat size
5.The effect of heat treatments on microstructure of a cast Ti 47Al 2Nb 2Cr 0 2Si(atom fraction,%) alloy was investigated The results show that the microstructure of the rapidly cooled cast alloy is single γ lamellae structure The phase constitution and grain size of the cast alloy can be adjusted through various heat treatments After a suitable heat treatment, the grain size reaches 40 50μm

