Theoretical analysis of minimum metal foil thickness achievable by asymmetric rolling with fixed identical roll diameters

Liu, Xin; Li, Xianghua; Song, Meng; Sun, Xiangkun; Liu, Lizhong

doi:10.1016/s1003-6326(16)64138-9

Cited by 15 publications

(9 citation statements)

References 14 publications

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“…In aluminium alloys can deformation texture improve the ratio of plastic deformation [6][7][8][9]. The orientation of components in surface layer at high frictional resistance between the sheet and the roll is affected by geometrical parameters defined as the ratio of the sheet thickness of the contact length between the sheet and rolls [10][11][12]. Asymmetric rolling can be realised in several ways:…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Hight Purity Aluminium After Asymmetric Rolling at Ambient and Cryogenic Temperatures

Šimčák¹,

Kvačkaj²,

Kočiško³

et al. 2017

Acta Metall Slovaca

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<p class="AMSmaintitle"><span lang="EN-US">Ultrafine grained materials are capable of superplastic elongation at strain rates faster than those currently employed for commercial superplastic forming operations. However, such operations require the material in the form of thin sheets. Asymmetric rolling (ASR), as one of severe plastic deformation (SPD) methods, was used to make ultra-fined grain materials with enhanced performance. This work show effect of the deformation paths on micro-hardness and mechanical properties changing during asymmetric rolling of pure aluminium. In our case, the asymmetric condition was introduced by using different diameters with a ratio of upper and bottom roll 2,4. The thickness of samples was reduced about 20% - 40% at ambient temperature and at cryogenic temperature. Asymmetric rolling at cryogenic temperature (ASR-C) provides greater strength tensile properties than rolling at ambient temperature (ASR-A). </span></p>

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Section: Introductionmentioning

confidence: 99%

Evaluation of Hight Purity Aluminium After Asymmetric Rolling at Ambient and Cryogenic Temperatures

Šimčák¹,

Kvačkaj²,

Kočiško³

et al. 2017

Acta Metall Slovaca

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“…Regarding the higher ∆r values of the asymmetrically rolled samples in the deformed condition, after the heat treatment the asymmetrically rolled samples in all cases had a lower ∆r than the symmetrically rolled samples. This phenomenon could be attributed to a more appropriate texture for the successful heat treatment [29].…”

Section: Anisotropymentioning

confidence: 95%

“…The asymmetric rolling of aluminum was in most cases investigated for thin sheets with small dimensions [28,29]. This means it would be interesting to study the impact of asymmetry in the rolling process on thicker sheets.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Texture Evolution with Relation to Mechanical Properties of Compared Symmetrically and Asymmetrically Cold Rolled Aluminum Alloy

Kraner

Fajfar

Palkowski

et al. 2020

Metals

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The impact of asymmetric cold rolling was quantitatively assessed for an industrial aluminum alloy AA 5454. The asymmetric rolling resulted in lower rolling forces and higher strains compared to conventional symmetric rolling. In order to demonstrate the positive effect on the mechanical properties with asymmetric rolling, tensile tests, plastic-strain-ratio tests and hardness measurements were conducted. The improvements to the microstructure and the texture were observed with a light and scanning electron microscope; the latter making use of electron-backscatter diffraction. The result of the asymmetric rolling was a much lower planar anisotropy and a more homogeneous metal sheet with finer grains after annealing to the soft condition. The increased isotropy of the deformed and annealed aluminum sheet is a product of the texture heterogeneity and reduced volume fractions of separate texture components.

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“…G.Y. Tzou and X. Liu constructed a model used to calculate the minimum thickness for asymmetrical hot and cold PV rolling which considered the effect of friction factor [9,10]. H. Gao studied the influence of friction coefficient ratio on the cross shear deformation and rolling pressure and torque during asymmetrical rolling process by the slab method [4].…”

Section: Introductionmentioning

confidence: 99%

The Analytic Study on the Heavy Steel Plate Snake Rolling with the Same Roll Diameters

Jiang

Meng

Zhao

et al. 2018

Mathematical Problems in Engineering

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The deformation in the inner region along the thickness of the heavy steel plate can be improved by snake rolling method. Then the microstructure and property will be refined and the crack in the inner region may be avoided. Therefore, the in-depth research on snake rolling method mechanics parameter modeling should be conducted to guide production. A snake rolling process with the same roll diameters and different angular velocity was conducted in this paper. The rolling deformation zone will be divided into back slip zone, front slip zone, cross shear zone, and reverse deflection zone according to the direction of the friction during the snake rolling process. The four zones may not exist at the same time. The boundary conditions of existence of the back slip zone, front slip zone, and cross shear zone were established according to the relationship between threading angle and neutral angle. The calculating models which were used to calculate the snake rolling mechanical parameters including the rolling force and rolling torque were set up. The calculated models of unit compressive pressure in the four zones were set up by the slab method, and on this basis the accurate calculating models of the rolling force and rolling torque were set up according to the composition of the rolling deformation zone and the boundary condition. The mechanical parameters were calculated by the analytical method and the numerical method, and the relative deviation is less than 6% which can satisfy the industrial requirement. The present analytical model can predict the characteristics during snake rolling easily and quickly and it is also suitable for online control applications.

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Theoretical analysis of minimum metal foil thickness achievable by asymmetric rolling with fixed identical roll diameters

Cited by 15 publications

References 14 publications

Evaluation of Hight Purity Aluminium After Asymmetric Rolling at Ambient and Cryogenic Temperatures

Evaluation of Hight Purity Aluminium After Asymmetric Rolling at Ambient and Cryogenic Temperatures

Microstructure and Texture Evolution with Relation to Mechanical Properties of Compared Symmetrically and Asymmetrically Cold Rolled Aluminum Alloy

The Analytic Study on the Heavy Steel Plate Snake Rolling with the Same Roll Diameters

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