Evolution of shear texture during the asymmetric rolling and its annealing behavior in a twin-roll casting AA6016 sheet: an ex-situ electron backscatter diffraction study

Ren, Xiaoyan; Zhang, Xieyi; Liu, Yu; Zhao, Likai; Zhou, Wenlong

doi:10.1016/j.jmrt.2020.04.026

Cited by 15 publications

(5 citation statements)

References 52 publications

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“…After annealing for 1 min, the main texture is still deformation texture. Meanwhile, a small amount of cube textures ({100} <001>) and ({025} <001>) begin to appear, which are annealing textures [ 20 ]. With the increase in annealing time, the annealing texture intensity increases obviously, and the annealing texture strength reaches 38.0 after annealing for 60 min.…”

Section: Resultsmentioning

confidence: 99%

Softened Microstructure and Properties of 12 μm Thick Rolled Copper Foil

et al. 2022

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Up to now, 12 μm thick rolled copper foil is the thinnest rolled copper foil that can be stably produced. The softened microstructure and properties of 12 μm thick rolled copper foil were systematically studied in this paper. The softened process consists of thermal treatment at 180 °C for different times. The results show that the softened annealing texture is mainly cubic texture, and the cubic texture fraction increases with the increase in annealing time. The cubic texture fraction reaches the highest (34.4%) after annealing for 60 min. After annealing for 1–5 min, the tensile strength and the bending times decrease significantly. After annealing for 10–60 min, the tensile strength tends to be stable, and the bending times increase slightly. With the increase in annealing time, the electrical conductivity increases gradually, reaching 92% International Annealed Copper Standard (IACS) after annealing for 60 min. Electrical conductivity can be used as a fast and effective method to analyze the microstructure of metals.

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Section: Resultsmentioning

confidence: 99%

Softened Microstructure and Properties of 12 μm Thick Rolled Copper Foil

et al. 2022

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“…Ren et al [63] observed that, for a 6016 alloy, the shear texture of the annealed ASR sheet was enhanced during recrystallization, at the expense of Cube texture, resulting in an increase of the r value. In a subsequent work, Ren et al [66] also observed and explained the transformation of an initial Cube texture into a combination of deformation textures components and shear textures components after ASR, while upon annealing those shear texture components became reinforced and prevailed over Cube components. This was explained by the relative spatial orientation of those texture components, facilitating the transition from deformation texture components to shear texture components.…”

Section: Texture Of Aluminium Alloysmentioning

confidence: 91%

“…A different technique-twin-roll casting and subsequent symmetric and asymmetric rolling-was implemented by several authors [55,[63][64][65][66]. These studies showed that the initial sheet texture components (after twin-roll casting) were different than those of the conventional processing route (Direct Casting followed by hot-rolling).…”

Section: Texture Of Aluminium Alloysmentioning

confidence: 99%

“…This was attributed to the combined effects of texture and grain refinement. In a later work also on a AA6016 alloy, Ren et al [66] observed that an increase of annealing time is not recommended since it decreased the ultimate tensile strength and hardness while the ductility seemed to become stabilized. Ren et al [100] performed ASR combined with thermal treatments on a AlMgSi aluminum alloy.After the complete processing route-including pre-treatment, ASR and natural ageing -they observed higher fractions of the RC({001}<110>) and rotated Goss ({011}<110>) components, attributed to the higher imposed shear strains.…”

Section: Aluminum Alloysmentioning

confidence: 99%

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Asymmetrical Rolling of Aluminum Alloys and Steels: A Review

Vincze

Simões

Butuc

2020

Metals

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Asymmetric rolling is an attractive metal forming process due to its simplicity, low cost and capability to produce unique characteristics in materials. The asymmetry promoted by the process leads to a formation of a large collection of texture components and a refined structure which is capable to improve the mechanical behavior of metallic materials. The aim of this work is to present a perspective of the process and to construct the bases for future development and application of this technique. Thus, several aspects are addressed such as process methods (i.e., dissimilarity of the rolls diameters, rolls angular speed or friction conditions), the process parameters (i.e., total thickness reduction, thickness reduction per pass, peripheral speed ratio, rolling routes) and their effect on material properties, including texture and microstructure evolution, and mechanical properties. This review is focused on the experimental description of asymmetric rolling applied to aluminum alloys and steels. Although the asymmetric rolling application was mostly at a laboratory scale, there is a good perspective for its implementation in the industry. The pros and cons based on the up to date literature and authors’ experience are presented and discussed.

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“…Intensity weakening or randomization of the shear textures during the annealing of AA6xxx was also observed [ 16 , 17 ]. To gain a better understanding of the enhanced formability of the Al-Mg-Si alloy used for automotive outer panels, the shear texture evolution of twin-roll casted AA6016 sheets during ASR was investigated, with the results showing that the formability of ASR sheets was significantly improved [ 18 ]. Effects of the differential roll speeds on the microstructure, texture, and mechanical properties of 7075 aluminum plates fabricated by a continuous casting and rolling (CCCR) process were investigated [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Shear Texture Evolution during the Symmetric and Differential Speed Rolling of Al-Si-Mg Alloys Fabricated by Twin Roll Casting

Cho,

Lee,

Lee

2023

Materials

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The effects of a reduction in area (RA) and the speed ratio between the top and bottom rolls on a shear strain and the crystallographic texture evolution of Al-Si-Mg (1.0%Si-0.6%Mg) aluminum alloys fabricated by twin roll casting (TRC) were comprehensively examined experimentally and through numerical predictions. Initial twin-roll casted strips had a texture gradient from the surface to the center. ⟨111⟩//ND textures were found in the surface layer, and weak rolling textures existed in the center of the strip. The distributions of shear and plane strain compression (PSC) textures varied with the RA and differential speed ratio. Strong shear textures including a rotated cube, {100}⟨011⟩, were obtained from both the symmetric and differential speed rolling processes. Symmetric rolling with a different reduction in area (SRDRA) produced shear textures mainly in the surface layer. Differential speed rolling (DSR) caused dynamic shear textures along the thickness direction, not limited to the surface. Based on the finite element method and crystal plasticity, the effects of different RA values, differential speed ratios, and friction coefficients on shear strain and texture evolution are discussed in detail. Loads measured from work rolls during DSR decreased with an increase in the speed ratio.

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Evolution of shear texture during the asymmetric rolling and its annealing behavior in a twin-roll casting AA6016 sheet: an ex-situ electron backscatter diffraction study

Cited by 15 publications

References 52 publications

Softened Microstructure and Properties of 12 μm Thick Rolled Copper Foil

Softened Microstructure and Properties of 12 μm Thick Rolled Copper Foil

Asymmetrical Rolling of Aluminum Alloys and Steels: A Review

Dynamic Shear Texture Evolution during the Symmetric and Differential Speed Rolling of Al-Si-Mg Alloys Fabricated by Twin Roll Casting

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