Effect of differential speed rolling strain on microstructure and mechanical properties of nanostructured 5052 Al alloy

Loorentz,; Ko, Young Gun

doi:10.1016/j.jallcom.2012.10.128

Cited by 54 publications

(21 citation statements)

References 24 publications

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“…A differential speed rolling (DSR) technique is a process in which different rotational speeds of upper and lower rolls are applied, so that the shear strain could be imposed throughout the samples due to the asymmetric deformation characteristics [5,6]. Several studies have been conducted to undertake the microstructure, mechanical properties, and texture formation of the various metallic materials fabricated via a DSR process, such as magnesium [7], aluminum [8], copper [6,9], titanium [10], and steel [5,[11][12][13]. The results of these studies showed that the intense plastic strain by DSR could lead to a significant reduction in grain size together with enhanced mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Strain and crystallographic texture evaluation of interstitial free steel cold deformed by differential speed rolling

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Strain and crystallographic texture evaluation of interstitial free steel cold deformed by differential speed rolling

et al. 2015

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“…For comparison, grain sizes of AA 5052 obtained using other methods are also listed. The microstructure produced by homogenization at 550°C for 30 min followed by air cooling has coarse grains (∼95 μm) [30]. The microstructure of an AA5052 produced by rheo-squeeze casting with a solid fraction of 0.17 solidified under 100 MPa consists of the relatively large grains (∼75 μm) and fine grains (∼32 μm) [31].…”

Section: Structurementioning

confidence: 99%

“…In the l.6-mm thick cold rolled sheet of a continuous-cast AA 5052, the average length and average thickness of the elongated grains in the near-surface region are 18 and 1.5 μm, respectively, whereas the corresponding values in the core region are 20 and 2.0 μm, respectively [29]. The microstructure resulting from four-pass differential speed rolling is characterized by nearly equiaxed nanostructured grains of size ∼0.7 μm [30]. The grain size resulting from equal channel angular extrusion (ECAE) changed from 0.3 Adding the Al ingot…”

Section: Structurementioning

confidence: 99%

Improvement of AA5052 sheet properties by electromagnetic twin-roll casting

et al. 2015

Int J Adv Manuf Technol

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Electromagnetic fields were used in twin-roll casting (TRC) of aluminum alloy 5052 (AA5052) for improvement of the microstructure and mechanical properties. A static magnetic field induces an inhibiting effect on the melt in the cast-rolling area and reduces diffusion of the solutes. It also results in more nucleating opportunities and less segregation, thus enhancing the mechanical properties. However, the static magnetic field does not change the orientation of crystal growth and columnar crystals still exist in microstructure. On the other hand, an oscillating magnetic field can refine the suspended particles and induce strong convection. This leads to more uniform distribution of temperature and solute elements, simultaneously increasing nucleating opportunities and decreasing segregation, thereby enhancing the mechanical properties. An oscillating magnetic field also inhibits the orientation of crystal growth and makes finer and equiaxed grains.

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“…Contrary to other SPD methods such as high pressure torsion and equal channel angular pressing, the asymmetric rolling allows to provide the possibility for overcoming the limitation of producing UFG materials with large dimensions due to its continuous feature [8]- [9]. Among the asymmetric rolling processes, the differential speed rolling in which the speeds of the rolls are different, is considered to be the most effective for achieving UFG structure of materials [10]- [13]. Better mechanical properties of wire rod, round bars and hexagonal profiles can be achieved due to large plastic deformation in asymmetric three-roll rolling process.…”

Section: Introductionmentioning

confidence: 99%

FE Simulation of the Stress-Strain State during Shear-Compression Testing and Asymmetric Three-Roll Rolling Process

et al. 2017

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Abstract.A three-roll rolling process is a significant technique in the production of wire rod, round bars and hexagonal profiles for structural applications. Better mechanical properties of wire rod, round bars and hexagonal profiles can be achieved due to large plastic deformation by the three-roll rolling process. Asymmetric rolling is a novel technique characterized by a kinematic asymmetry linked to the difference in peripheral speed of the rolls, able to introduce additional shear strains through the bar thickness. Physical simulation of shear strain, which is similar to that occurring in asymmetric three-roll rolling process, is very important for design of technology of producing ultrafine grain materials. Shear testing is complicated by the fact that a state of large shear is not easily achievable in most specimen geometries. Application of the shear-compression testing and specimen geometry to physical simulation of asymmetric three-roll rolling process is discussed in the paper. FEM simulation and comparison of the stress-strain state during shear-compression testing and asymmetric three-roll rolling process is presented. The results of investigation can be used to optimize the physical simulation of asymmetric three-roll rolling processes and for design of technology of producing ultrafine grain materials by severe plastic deformation.

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Effect of differential speed rolling strain on microstructure and mechanical properties of nanostructured 5052 Al alloy

Cited by 54 publications

References 24 publications

Strain and crystallographic texture evaluation of interstitial free steel cold deformed by differential speed rolling

Strain and crystallographic texture evaluation of interstitial free steel cold deformed by differential speed rolling

Improvement of AA5052 sheet properties by electromagnetic twin-roll casting

FE Simulation of the Stress-Strain State during Shear-Compression Testing and Asymmetric Three-Roll Rolling Process

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