A Study on the Microstructures of Rapidly Solidified Ti-48Al-xCr Intermetallic Compounds

The effects of rapid solidification and Cr addition to the microstructure variations of the rapid solidified Ti-48Al-xCr(X = 2,4,6) alloys have been investigated using X-ray diffractometry, optical microscopy, scanning electron microscopy and transmission electron microscopy. The segregated coarse phase was eliminated and the microstructure was refined by rapid solidification of the cooling rate of . The lattice parameters and tetragonality of phase decrease with the increase Cr content and by the rapid solidification. Non-equilibrium phase remains at room temperature condition, which would be resulted from the restriction of phase transformation to .