Effect of deformation routes on the evolution of strain states and texture during asymmetrical cold rolling and subsequent annealing in interstitial-free steel

Abstract

Asymmetrical rolling was carried out in an interstitial-free steel with different velocities of upper and lower rolls. In order to analyze the effect of change in strain histories on the evolution of textures during asymmetrical cold rolling and subsequent annealing, asymmetrical rolling was performed either reversibly or unidirectionally. The two different asymmetrical rolling routes were accompanied by the formation of different cold rolling textures. The strain state during asymmetrical rolling was determined by the finite element method and verified by macro-texture analysis and texture modeling. Weakening and randomization of textures occurred during recrystallization annealing, which was interpreted by the absence of preferred nucleation in specific orientations.

Effect of hot band grain size on development of textures and magnetic properties in 2.0% Si non-oriented electrical steel sheet

“…The as-received hot band with a thickness of 10.0 mm was asymmetrically hot rolled to 2.7 mm thick sheet and then annealed in two different conditions so as to produce two initial samples with identical random texture yet different grain sizes [22,23]. One specimen was annealed at 850 C for 5 min, whereas the other one was annealed at 1000 C for 1 h. These two different annealing practices led to different grain sizes of 150 m and 500 m as shown in Fig.…”

“…Accordingly, the hot bands of commercially produced NO electrical steel sheets display pronounced textures which, upon cold rolling, will lead to the characteristic rolling textures with a strong <110>//RD fiber. In the present work random textures of the initial SG and LG hot bands were deliberately prepared through asymmetric hot rolling followed by hot band annealing so as to produce two initial samples with identical texture yet different grain sizes [22,23]. Thus, the initial conditions prior to cold rolling resemble those of conventional low C steels such that cold rolling leads to similar textures.…”

“…-10 -Hot bands of low carbon steels commonly display a random texture since the -to- phase transformation during and after hot rolling leads to a randomization of grain orientations [23,32,33].…”

Simulations of Texture Evolution in the Near-Surface Region During Aluminum Rolling

“…In addition, a standard assumption of a constant Coulomb coefficient of friction results in overestimation of frictional forces. Nah et al [11] and Jiang et al [12] (aluminum) and Wauthier et al [13] and Pyon et al [14] (steel strips) considered asymmetric rolling to increase the influence of shear strain during cold rolling to obtain a random and uniform texture throughout the thickness and to control the grain size after the deformation process and during subsequent recrystallization annealing. The textural changes during symmetric and asymmetric cold rolling of the aluminum alloy AA 6111 were compared, revealing that conventional symmetric rolling cannot transmit shear deformation throughout the strip thickness.…”