Severe plastic deformation by equal channel angular pressing: product quality and operational details

Filho, Anibal de Andrade Mendes; Prados, Erika Fernanda; Valio, Gustavo Trindade; Rubert, José Benaque; Sordi, Vitor Luiz; Ferrante, M.

doi:10.1590/s1516-14392011005000045

Cited by 19 publications

(11 citation statements)

References 22 publications

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“…Currently, methods of intensive plastic deformation (IPD) for grinding the ICCB structure are widely developed and widely used [10][11][12][13][14]. These methods are explored for the manufacture of products with a submicro-and nanocrystalline structure.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Identification of regularities of changes in energy-power parameters depending on the design of the roller node of a new radial-shear mill by computer simulation

Mashekov

Nurtazayev

Mashekova

et al. 2020

EEJET

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This paper proposes a radial-shear mill (RSM) of a new design, which allows by rolling or rolling and pressing operations obtaining high-quality rods and wires. In addition, it proposes the method of computer calculation of the energy-power parameters of bar extrusion at the RSM of the new design. Mathematical dependences and calculation algorithm were described, which allow calculating energy-power parameters of the combined bar manufacturing process at a given level of technological parameters. Based on the results of analytical studies and computer modeling, the energy-power parameters were defined and analyzed, in addition, the laws of their changes were determined. It is shown that, regardless of the alloy grade or type, when rolling billets on a new RSM with smooth rolls, the strain force is larger in magnitude compared to rolling in helical rolls. It was found that, in comparison with rolling of bars in smooth and helical rolls, their processing by a combined rollingpressing process leads to an increase in the deformation force of alloys M1 and D16 by 1.1-1.15 and 1.15-1.3 times, respectively. It is shown that during the deformation of the rods on the new RSM, by controlling the paths of the metal flow in the deformation zone, intensive grinding of the metal structure can be achieved. It was found that when pressing the bars on the new RSM, the temperature of the workpiece increases up to 420 °С, which leads to a sharp decrease in the force required for deformation. The nature of the temperature distribution of the pressed metal in the deformation zone was determined. The adequacy of the models was proved by comparing calculated values of the power parameters of extrusion, obtained by engineering technique and numerical simulation

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Identification of regularities of changes in energy-power parameters depending on the design of the roller node of a new radial-shear mill by computer simulation

Mashekov

Nurtazayev

Mashekova

et al. 2020

EEJET

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“…In [7], a new die design has been proposed for processing of materials using equal channel angular extrusion. Parameters and recommendations for the ECAP process were discussed in [8]. ECAP can be applied for the electronics and aerospace industries [9] and electrical contact wire production [10].…”

Section: Introductionmentioning

confidence: 99%

Solid-state welding of ultrafine grained copper rods

Morawiński

Jasiński

Ciemiorek

et al. 2021

Archiv.Civ.Mech.Eng

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The article focuses on the Direct Drive Rotary Friction Welding of ultrafine-grained copper rods, which feature increased mechanical properties and good electrical properties, yet are limited in size. The use of UFG metals is often limited by the too small dimensions of semi-finished elements produced by SPD methods. Therefore, the production of finished machine parts from UFG metals is currently economically unjustified. Dismissal of dimensional limitations can be done by introducing joining to technological processes. The proposed joining method does not lead to a melting of the material in the joining zone or excessive degradation of the UFG microstructure. To obtain the best results, the research used the method of low-energy welding of two kinds of specimens: with a flat or a conical contact surface. In the article, the authors present, by means of metallographic microsections and microhardness measurements, the influence of rotational speed, welding pressure and conical shape contact surface on the quality of the obtained joints. The conducted research made it possible to obtain good quality joints whose microhardness is reduced only by about 10% in comparison with the base material and the tensile strength dropped from only 397–358 MPa.

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“…Severe plastic deformation (SPD) is commonly defined as processes that ultra-large plastic strains are applied to a bulk material, with no considerable change in its dimensions, and capable of producing ultrafine grained (UFG) metals [1][2][3][4] . Several SPD processes were developed, though some have acquired more relevance, as high pressure torsion (HPT) 5 , accumulative roll-bonding 6 and, especially, equal channel angular pressing (ECAP) [7][8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Ecap Consolidation and Heat Treatment of Blended Elemental Powders of Iron, Chromium, Nickel and Manganese

et al. 2019

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Severe plastic deformation by equal channel angular pressing: product quality and operational details

Cited by 19 publications

References 22 publications

Identification of regularities of changes in energy-power parameters depending on the design of the roller node of a new radial-shear mill by computer simulation

Identification of regularities of changes in energy-power parameters depending on the design of the roller node of a new radial-shear mill by computer simulation

Solid-state welding of ultrafine grained copper rods

Ecap Consolidation and Heat Treatment of Blended Elemental Powders of Iron, Chromium, Nickel and Manganese

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