A study of the recrystallization mechanisms in doped ultra-high purity iron

The influence of specific alloying elements (C, Mn) on recrystallization of cold rolled iron have been studied on ultra-high-purity (UHP) iron, doped with 10 mass ppm of carbon (FeC) and FeC doped with 1000 ppm of manganese ( FeCMn). The hot-bands were obtained by warm-rolling at a temperature high e nough for the samples to recrystallise spontaneously during the temperature slow down. The grain size of the pure iron is strongly decreased when a sm all quantity of carbon is present. The textures of these hot rolled sheets exhibit strong Goss components except for pure Fe which exhibits a partial or fibre. The Goss grains of the doped samples are thought to come from a n ucleation on deformation heterogeneities formed during the rolling at warm temperature. The Goss orientation being not stable during deformation, it d isappears during cold rolling and the deformation textures of the three mat erials look then similar, with a strong alpha fibre. After recrystallizatio n, the textures show gamma fibres with additional Goss components for FeC a nd FeCMn, and the textures weaken with the addition of doping elements.