Development of Texture in Interstitial-Free Steel Processed by Equal-Channel Angular Pressing

Ti + Nb-stabilised interstitial-free steel is deformed by equal-channel angular pressing (ECAP) adopting a route B-C up to an equivalent strain of 24. Upon ECAP the grain size decreases to ultrafine level and it becomes strongly textured. At epsilon(vm) = 0.6-6, components of both {110} fiber, , and of aOE (c) 111 > fiber, D (1 theta,) D (2 theta) with common components of E (theta), are existing but after epsilon(vm) a parts per thousand yen9, only aOE (c) 111 > fiber components are observed. At large strain, epsilon(vm) = 9-24, aOE (c) 111 > fiber texture is recorded with monoclinic symmetry. At epsilon(vm) = 0.6, coarse grains get split into deformation bands. Fragmentation of bands (at epsilon(vm) = 3) suppress components. At epsilon(vm) = 6, formation of lamellar structures increases intensity of mainly D (1 theta,) D (2 theta). At epsilon(vm) = 9, oriented ribbon grains result in strong D (1 theta,) D (2 theta) components with aOE (c) 111 > fiber. At epsilon(vm) = 15-24, conversion of ribbon grains to near-equiaxed shaped grains maintains aOE (c) 111 > fiber texture with enhanced intensity of D (1 theta) and D (2 theta) components.