Producing Brass Narrow Strips With an Ultrafine-Grained Structureby Asymmetric Rolling

Pesin, Alexander; Pustovoytov, Denis; Biryukova, Olesya; Kozhemiakina, Anna; Пивоварова, К. Г.

doi:10.37904/metal.2021.4104

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…In view of this, producing narrow strips from aluminum alloy D16, 0.65 mm thick, in compliance with GOST 13726-97, by conventional symmetric rolling, required four stages of rolling and four stages of annealing (Fig. 1) [14].…”

Section: Developing Process Flow Charts To Increase Technological Pla...mentioning

confidence: 99%

Experimental study of the effect of increasing technological plasticity during asymmetric rolling of aluminum alloys

Kozhemyakina

2023

Superplasticity in Advanced Materials

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Abstract. In this paper the effect of asymmetric rolling on the possibility of increasing the technological plasticity of aluminum alloys was investigated. The experimental research was carried out on a laboratory asymmetric rolling mill with an individual drive of the work rolls with the possibility of creating a speed ratio from 1.0 to 5.0. It was shown that the increase of speed ratio of the work rolls from 1.0 to 5.0 significantly reduce the rolling force in comparison with symmetric rolling. Rolling force decreased in 1.9 times for alloy AD33 (AA6061), in 2.3 times for alloy AMg6, in 3.2 times for alloy D16 (AA2024). At the same time the technological plasticity was increased. Technological plasticity characterizes the ability of a material to undergo higher thickness reductions without fracture under certain conditions of stress, temperature, and strain rate. In asymmetric rolling the thickness reduction was increased from 48 to 87% for alloy D16, from 50 to 59% for alloy AMg6, and from 40 to 75% for alloy AD33 in comparison with symmetric rolling. In all cases the samples had initially room temperature and were subjected only to deformation heating and friction heating. Extremely high thickness reduction (87%) was achieved by a single pass asymmetric rolling (at speed ratio 5.0) for alloy D16. It was found that the ductility of the alloy D16 was 12.3% after asymmetric rolling with a thickness reduction of 87% and without the use of annealing. This was approximately 2 times higher than the initial ductility (6.2%) of the same alloy in the initial annealed state and much higher than ductility (0.3%) after symmetric rolling. New technological schemes of sheet rolling of aluminum alloys with high ductility and increased technological plasticity have been developed.

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Section: Developing Process Flow Charts To Increase Technological Pla...mentioning

confidence: 99%

Experimental study of the effect of increasing technological plasticity during asymmetric rolling of aluminum alloys

Kozhemyakina

2023

Superplasticity in Advanced Materials

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Development of Asymmetric Cold Rolling Technology of Low Carbon Steel Grades in Order to Increase the Thickness of the Hot Rolled Strip

Barysnikova,

Nosov

2024

Lecture Notes in Mechanical Engineering

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Experience in obtaining laminated aluminum composites by asymmetric accumulative roll bonding

2022

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The issue of asymmetric processing of long products in the range of speed ratios of work rolls from 2 to 5 has not been widely studied and is of interest from the point of view of increasing both the strength and ductility of metal products. An area of severe plastic deformation was found, showing the relationship between shear strain and shear angle, at which large compressive strains and ultra-high shear strains occur. An analysis was made of the values of equivalent deformations of laminated aluminum composites obtained both after the first and second processing cycles, modeled in the DEFORM and QForm software systems. The paper defines a rational range of the speed ratios of work rolls, which makes it possible to obtain not only the rectilinear movement of the metal at the exit from the deformation zone, but also the maximum elongation, the ratio of tensile strength to the yield strength for laminated aluminum composites. A regularity has been deduced showing that with an increase in the speed ratio of work rolls, the rolling forces decrease, the value of the relative reduction at a constant roll gap increases. At the maximum speed ratio of the rolls (5), melting of the samples occurs.

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Producing Brass Narrow Strips With an Ultrafine-Grained Structureby Asymmetric Rolling

Cited by 3 publications

References 16 publications

Experimental study of the effect of increasing technological plasticity during asymmetric rolling of aluminum alloys

Experimental study of the effect of increasing technological plasticity during asymmetric rolling of aluminum alloys

Development of Asymmetric Cold Rolling Technology of Low Carbon Steel Grades in Order to Increase the Thickness of the Hot Rolled Strip

Experience in obtaining laminated aluminum composites by asymmetric accumulative roll bonding

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