Effect of speed-ratio on microstructure, and mechanical properties of Mg–3Al–1Zn alloy, in differential speed rolling

Kim, Woo Jin; Hwang, B.G.; Lee, M.J.; Park, Y.B.

doi:10.1016/j.jallcom.2011.05.063

Cited by 67 publications

(30 citation statements)

References 16 publications

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“…Asymmetric rolling process is one of them [5]- [7]. 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].…”

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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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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“…It was found out that the shear strain takes a great portion of the total effective strain in average. Kim et al [18] analysed the effect of speed ratio on the development of shear strain and texture during differential speed rolling. FEM simulation results showed that the effective strain accumulated during asymmetric rolling increased with high-speed ratio.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer modeling in asymmetrical sheet rolling of aluminium alloys with ultra high shear strain

Pesin

Pustovoytov

2016

MATEC Web Conf.

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Abstract. Asymmetrical sheet rolling is a method of severe plastic deformation (SPD) for production of aluminium alloys with UFG structure. Prediction of sheet temperature during SPD is important. The temperature of sheet is changed due to the conversion of mechanical work into heat through sliding on contact surfaces and high shear strain. Paper presents the results of FEM simulation of the effect of contact friction, rolling speed and rolls speed ratio on the heating of aluminium sheets during asymmetrical rolling.

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“…DSR utilizes different velocities of the upper and lower rolls or, alternatively, differently sized rolls (asymmetric rolling) yielding different surface velocities of the rolls. By this means, DSR induces a significant amount of shear deformation within the rolled material yielding a pronounced grain refinement [2][3][4][5] and a change in texture [2,6,7].…”

Section: Introductionmentioning

confidence: 99%

Ti/Al Multi-Layered Sheets: Differential Speed Rolling (Part B)

Romberg

Freudenberger

Watanabe

et al. 2016

Metals

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Differential speed rolling has been applied to multi-layered Ti/Al composite sheets, obtained from accumulative roll bonding with intermediate heat treatments being applied. In comparison to conventional rolling, differential speed rolling is more efficient in strengthening the composite due to the more pronounced grain refinement. Severe plastic deformation by means of rolling becomes feasible if the evolution of common rolling textures in the Ti layers is retarded. In this condition, a maximum strength level of the composites is achieved, i.e., an ultimate tensile strength of 464 MPa, while the strain to failure amounts to 6.8%. The deformation has been observed for multi-layered composites. In combination with the analysis of the microstructure, this has been correlated to the mechanical properties.

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Effect of speed-ratio on microstructure, and mechanical properties of Mg–3Al–1Zn alloy, in differential speed rolling

Cited by 67 publications

References 16 publications

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

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

Heat transfer modeling in asymmetrical sheet rolling of aluminium alloys with ultra high shear strain

Ti/Al Multi-Layered Sheets: Differential Speed Rolling (Part B)

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