Effect of Combined Rolling–ECAP on Ultrafine-Grained Structure and Properties in 6063 Al Alloy

Naizabekov, Abdrakhman; Lezhnev, Sergey; Panin, Evgeniy; Volokitina, Irina; Arbuz, Alexandr; Koinov, Toncho; Mazur, Igor P.

doi:10.1007/s11665-018-3790-z

Cited by 30 publications

(10 citation statements)

References 30 publications

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“…Among the first such technologies are the Conform and Linex processes, modifications of which are being created at the present time [13,14]. For the possibility of deformation of longlength samples, a number of ECAP-based combined processes have been developed, which also ensure the continuity of the process [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Efficiency of Roll Profiles and Technological Schemes of Deformation of Asymmetric Rolling in Relief Rolls of C11000 Copper Alloy by FEM Simulation

Panin,

Esbolat,

Arbuz

et al. 2024

Modelling and Simulation in Engineering

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In this paper, finite element simulation of asymmetric rolling in relief rolls of C11000 copper alloy in order to analyze the effectiveness of possible roll profiles and technological schemes of deformation was performed. The scientific innovation of this work lies in determining the patterns of development of stress-strain state parameters for various configurations of rolls, as well as determining the effectiveness of metal processing using various technological schemes. It was found that the use of trapezoidal relief makes it possible to increase the level of metal processing by almost 5 times compared with the use of radial relief. Comparison of technological schemes of deformation showed that deformation with 180° workpiece turning between passes significantly reduces the influence of the asymmetry factor. Deformation without changing the workpiece position between the passes has the opposite effect, and such a scheme significantly increases the influence of the asymmetry factor. Deformation with a transverse workpiece shift for the relief period between passes has the effect of a “golden mean.” The conducted laboratory experiment for lead billet showed that the shape change of lead billet during computer simulation has a high level of convergence with real conditions. At each stage of deformation, the difference in the geometric parameters of the workpiece between the model and the experiment did not exceed 3-5%. When deforming a copper billet, the maximum difference level was 8%, which is the result of the low rigidity of the rolling cage with smooth rolls.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Efficiency of Roll Profiles and Technological Schemes of Deformation of Asymmetric Rolling in Relief Rolls of C11000 Copper Alloy by FEM Simulation

Panin,

Esbolat,

Arbuz

et al. 2024

Modelling and Simulation in Engineering

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“…The development of methods of severe plastic deformation (SPD) in recent years has expanded the process of evolution of metal systems up to the formation of nanostructured state. Many review papers [1-3], experimental [4][5][6][7][8][9][10][11][12][13][14][15] and theoretical papers [16][17][18] have appeared in this direction, including those using computer modelling, the authors of which, systematizing the results obtained, complementing and enriching each other, create a general picture of severe deformation of solids. Nevertheless, it should be recognized that today there is still no general physical model of matter evolution under plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of Structure Formation under Severe Plastic Deformation: A Review

Volokitin,

Panin,

Lavrinyuk

2024

Metallofiz. Noveishie Tekhnol.

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Modern materials often have multicomponent alloys, whose properties are determined by their phase and structural composition formed as a result of previous thermomechanical processing. Therefore, the problem of managing the structural state occupies an important place in the overall strategy of developing new materials. Particular attention is drawn to phase transformations in ultrafine systems, in particular, in alloys subjected to severe plastic deformation. In this case, the sample size becomes an important parameter determining the physical properties of the substance and, in particular, its structural and phase compositions. Despite the considerable interest of researchers, until recently, it was not possible to achieve significant theoretical results in this area. Therefore, the development of modern models for describing structural transformations in heterogeneous systems and their application to ultrafine-grained materials seem promising and relevant.

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“…The main disadvantages of these technologies are the lack of continuity or the inability to process long workpieces. Attempts have been made to circumvent these limitations by developing combined processes, where two or more discrete processes are combined [22][23][24][25][26]. These methods have proven themselves well both in terms of the efficiency of metal processing and the deformation productivity.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Modeling of ECAP-Linex Combined Process of Severe Plastic Deformation

Panin

Volokitina

Volokitin

et al. 2023

Modelling and Simulation in Engineering

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The paper presents theoretical studies of a new deformation process combining the stages of equal-channel angular pressing (ECAP) and the “Linex” scheme. For correct finite element modeling of the process, a technique with sequential input for the calculation of conveyor links is presented. To analyze the efficiency of metal processing, the main parameters of the stress–strain state are considered: equivalent strain, equivalent stress, and average hydrostatic pressure, as well as the deformation force on the main elements of the combined process: pulley, matrix, and conveyor link. To analyze the resulting deformation forces, the stages of pressing in a matrix and compression by a chain conveyor were separately considered. Equations for determining the forces acting on the drive pulley, ECA matrix, and the chain element link were obtained. Comparison of values showed that the force values in the calculation and simulation have a high level of convergence. In all three considered details, the difference value did not exceed 10%. The variational modeling allowed to determine the optimal values of the main technological and geometric parameters of the process.

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Effect of Combined Rolling–ECAP on Ultrafine-Grained Structure and Properties in 6063 Al Alloy

Cited by 30 publications

References 30 publications

Investigation of the Efficiency of Roll Profiles and Technological Schemes of Deformation of Asymmetric Rolling in Relief Rolls of C11000 Copper Alloy by FEM Simulation

Investigation of the Efficiency of Roll Profiles and Technological Schemes of Deformation of Asymmetric Rolling in Relief Rolls of C11000 Copper Alloy by FEM Simulation

Mechanisms of Structure Formation under Severe Plastic Deformation: A Review

Finite Element Modeling of ECAP-Linex Combined Process of Severe Plastic Deformation

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