Effect of Al and Mo on the textures and microstructures of dual phase steels

The effect of Al and Mo addition on the development of microstructures and textures of dual phase steels for the usage in car outer panel was studied. The two elements were separately added to a base alloy to compare their effects on the microstructures and textures along the processing route from hot rolling to annealing. They showed common consequence of grain refinement of hot bands, which resulted in the suppression of deformation heterogeneities during cold rolling, subsequently enhanced the desirable γ-fiber and removed some detrimental minor components in the annealing textures. The effect of Mo was stronger than Al, which could be attributed to the fixation of solute C by Mo.