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Orientation relationships between TiB (B27), B2, and Ti(3)Al phases

Journal of Materials Research

The orientation relationships among TiB (B27), B2, and Ti(3)Al 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](TiB)parallel to[00](B2), (001)(TiB)parallel to(010)(B2); and that between TiB (B27) and Ti(3)Al was [010](TiB)parallel to[1120](Ti3Al), (001)(TiB)parallel to(0001)(Ti3Al). These orientation relationships have been predicted precisely by the method of coincidence of reciprocal lattice points.

关键词: tial-based alloys;grain-refinement;titanium aluminides;boron;addition;al;microstructure;intermetallics;evolution;system