Texture evolution during hot-rolling and recrystallization in B2-type FeAl, NiAl and CoTi intermetallic compounds

The texture evolution during the hot-rolling and the recrystallization of B2-type Fe-48Al, Ni-50Al and Co-50Ti (expressed by at.%) intermetallic compounds were investigated. By hot-rolling at 973 K, Fe-48Al showed a microstructure with coarse grains elongated along rolling direction, while Ni-50Al and Co-50Ti showed a deformed microstructure featured by the heavily distorted (elongated) grains and/or the deformation bands. The hot-rolling texture of Fe-48Al was composed of {111}< uvw >, while those of Ni-50Al and Co-50Ti were composed of {111}< 110 > and {111}< 112 >, respectively. After annealing, the recrystallized grains were preferentially nucleated at the grain boundaries for Fe-48Al, and in the heavily distorted regions or the deformation bands for Ni-50Al and Co-50Ti. The orientations of the recrystallized grains were similar with those of the deformed matrix, especially for Ni-50Al and Co-50Ti. The recrystallization textures were generally more dispersive than the hot-rolling texture. Based on these results, the texture evolution during the hot rolling and the recrystallization of the B2-type intermetallic compounds were discussed.