FORMATION OF TEXTURES IN A C-SI-V DUAL-PHASE STEEL

A vanadium microalloyed steel (0.1 C, 1.50 Si, 0.1 V) was subjected to initial heat treatments and intercritical annealing at 750 and 810°C to produce dual-phase structures of different distribution. Intercritically annealed materials were cold-rolled to a reduction of 60% in thickness and small samples taken from them were recrystallisation annealed at two temperatures of 650 and 800°C for various lengths of time. The (110) pole-figures for the cold-rolled materials with different dual-phase distribution showed a strong {111}〈112〉 and a rather weak {111}〈110〉 texture components. The O.D.F. (orientation distribution function) plots also showed the major texture components, {111}〈110〉 and {111}〈110〉 along with the minor components, like, {337}〈110〉, {337}〈776〉, {112}〈111〉 and {112}〈110〉. No complete {111} fibre has been observed in the present investigation. Further the orientations {11,11,4}〈uvw〉 and {337}〈uvw〉 have been found to be present as weak and incomplete fibre. The (110) pole-figures of the recrystallised materials have shown similar features (with reduced pole densities) as compared to the cold-deformed materials. Similarly, no {111} fibre has been observed in the recrystallised materials. The behaviour of the other two components, namely {11,11,4}〈uvw〉, and {337}〈uvw〉 have been found to be similar to that in the cold deformed material.