Orientation relationships between TiB (B27), B2, and Ti₃Al phases

Abstract

The orientation relationships among TiB (B27), B2, and Ti₃Al phases have been investigated by transmission electron microscopy. By using the composite selected-area electron diffraction technique, the orientation relationship between TiB (B27) and B2 was determined to be [100][sub TiB] [001][sub B2], (001)[sub TIB] (010)[sub B2]; and that between TiB (B27) and Ti₃Al was [010][sub TiB] [1120]Ti₃Al, (001)[sub TiB] (0001)Ti₃Al. These orientation relationships have been predicted precisely by the method of coincidence of reciprocal lattice points.