Effect of Initial Sheet Thickness on Shear Deformation in Ferritic Rolling of IF-Steel Sheets.

Abstract

The effect of sheet thickness on shear deformation and texture for the ferrite rolling has been studied.The shear deformation was estimated from the distorted shape of inserted wire before rolling and FEM simulation. The deformed shape of inserted wires and FEM results showed that the shear strain decreased with increasing initial sheet thickness. The measuredand simulated textures also showed that the Goss component changedto Dillamore componentas the thickness increased, From rolling simulation of 20'1-reduction, the minimumshear deformation was found to exist for the given roll bite geometry and friction coefficient.

Ultra Grain Refinement of Commercial Purity Aluminum by a Multi-Stack ARB Process

“…In the present study, the interface friction is dominant, where the parameter l/d is sufficiently large. 16,17) Since the mill with 310 mm in roll diameter was used in not only two-layer stack ARB but also six-layer stack ARB, the parameter l/d (7.6 from the first to the third pass in each cycle) of the six-layer stack ARB is smaller than that (9.3) of the two-layer stack ARB, and therefore the two-layer stack ARB introduces higher shear strain.…”

Strain Variations on Rolling Condition in Accumulative Roll-Bonding by Finite Element Analysis

“…Here, Ls indicated 0.15 with lubricant and 1.5 without it. Since the effect of temperature in the rolled Al or IF steel sheet on the relation among  eq , , and Ls is small in comparison with the friction effect (Um et al, 2000;Inoue & Tsuji, 2009), it is likely from Figs. 6(a,c) and 11 (b,c) that the strain at the surface is 0.59 and  eq 0.97 for rolling with lubricant and 7.66 and  eq 5.34 for rolling without it.…”

“…The flection of the pin in the embedded-pin method makes the presence of the shear deformation clear. The pin flection in pure aluminum (Lee et al, 2002), interstitial free (IF) steel (Matsuoka et al, 1997;Sakai et al, 1988;Um et al, 2000;Kamikawa et al, 2007), and Type 304 stainless steel (Zhang et al, 1996; sheets rolled at various temperatures has been observed using this method. In the present study, the condition of a commercial 1100 Al sheet rolled at ambient temperature without lubricant and without front and back tensions reported by Lee et al, 2002 Table 1.…”

“…Flow of metals in rolling experiments makes the presence of the shear deformation clear and qualitative relation between equivalent strain including shear deformation and microstructure through sheet thickness has been reported in the literature (Lee et al, 2002;Sakai et al, 1988;Matsuoka et al, 1997). However, only a few studies have been carried out on quantitative correlation between microstructure and strain through a combination of experiments and finite element simulations (Um et al, 2000;Mukhopadhyay et al, 2007). The embedded-pin method (see Fig.…”

“…2. In interstitial free (IF) steel sheets rolled by 50% with and without lubrication, Um et al, 2000 investigated the variations of the strain distribution and the flection of an embedded pin against the roll bite geometry by changing the initial sheet thickness and roll diameter. However, the distribution of the shear strain is not shown and the effect of the roll bite geometry on strain distribution in sheet rolling is not systematically studied.…”