Theoretical and experimental evaluation of no-slip feeding condition in ECAP-Conform of a square-section metallic rod

Nosrati, Hasan Ghaforian; Khalili, Khalil; Gerdooei, Mahdi

doi:10.1007/s00170-020-06395-3

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…Also, they have presented a slip threshold criterion (STC) for performing the ECAP-C process successfully. There was a difference of about 11% between analytical and experimental method [19].…”

Section: Introductionmentioning

confidence: 91%

An investigation on the effective parameters and optimal design in ECAP-Conform process of commercially pure titanium using statistical and numerical approaches

2022

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The Equal Channel Angular Pressing-Conform (ECAP-Conform) process has improved the mechanical and functional properties of materials as well as resolves the disadvantages of conventional ECAP. The main goal of this study was investigation of the variable in ECAP-Conform process of pure titanium Grade 2. The design of experiments with full factorial technique was implemented in conjunction with finite element numerical simulation.The equivalent plastic strain, required torque, applied force on the ECAP die, and the warping radius of the product were measured and results were interpreted using analysis of variance. It was found that the ECAP die angles and the rod bending angle have the highest effect on both imposed strain and required torque. Also, the rod bending angle and the rod-die friction had no significant effect on the warping radius. The optimal values were specified for minimizing the required torque, reaction force, and warping radius, and maximizing the imposed strain. Based on the optimal estimated parameters, the minimum values of torque, force, warping radius, and maximum value of equivalent strain were predicted to 8.4 kN.m, 42 kN, 0.36 m, and 1.7, respectively. Also, the response optimizer obtained the results with less than 8% error in comparison with numerical simulation.

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Section: Introductionmentioning

confidence: 91%

An investigation on the effective parameters and optimal design in ECAP-Conform process of commercially pure titanium using statistical and numerical approaches

2022

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“…Among the greatest advantages of these methods is that they impart shear mixing via imposing shear strain and thus promote generation of dislocations, formation of substructure, polygonization, and subsequent grain refinement, all of which introduce changes in mechanical, electrical, and utility properties [8,9]. SPD methods, such as HPT (high pressure torsion) [10], ECAP (equal channel angular pressing) [11] and related methods -TCAP (twist channel angular pressing) [12], TCMAP (twist channel multi angular pressing) [13], ECAP-Conform [14], etc. -TE (twist extrusion) [15], FSP (friction stir processing) [16], ARB (accumulative roll bonding) [17] and others, are favourable to introduce significant substructure development and grain refinement.…”

Section: Introductionmentioning

confidence: 99%

effect of thermomechanical treatment on structural phenomena and ELECTROCONDUCTIVITY in copper conductors

Kunčická

Kacor

Dvořák

et al. 2022

METAL 2022 Conference Proeedings

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Despite its relatively high cost, copper is still the most popular electroconductive material. Its electroconductivity can be affected via structure modifications introduced by shear mixing, i.e. deformation processing, and/or thermomechanical treatment. Being an industrially applicable method of intensive plastic deformation, advantageously used to impart shear mixing, rotary swaging is favourable for production of long electroconductive wires. This study is focused on assessment of the effects of thermomechanical treatment on structural phenomena within copper conductors; the treatment consisted of room temperature rotary swaging and subsequent annealing. The results showed that the deformation ratio introduced via swaging was sufficient to impart homogenization of structure as the differences between the grain sizes and texture orientations within the peripheral and axial regions of the conductor were minimal. On the other hand, the swaged and annealed conductor featured slight inhomogeneity between the peripheral and axial regions, especially as regards structure regeneration and the occurrence of twinning, which was more pronounced in the axial region of the thermomechanically processed conductor (the volume fraction of <111> 60° twin boundaries was 60 % within this sample region). Interestingly, the electroconductivity was higher than 100 % IACS (International Annealed Copper Standard) for the swaged conductor, and even increased up to 104.4 % IACS for the annealed conductor due to the structure modifications imparted by the applied heat treatment.

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MLP neural network with an optimal architecture for modeling the ECAP-C process

Moradi

Gerdooei²,

Varedi-Koulaei³

et al. 2022

Neural Comput & Applic

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Theoretical and experimental evaluation of no-slip feeding condition in ECAP-Conform of a square-section metallic rod

Cited by 6 publications

References 12 publications

An investigation on the effective parameters and optimal design in ECAP-Conform process of commercially pure titanium using statistical and numerical approaches

An investigation on the effective parameters and optimal design in ECAP-Conform process of commercially pure titanium using statistical and numerical approaches

effect of thermomechanical treatment on structural phenomena and ELECTROCONDUCTIVITY in copper conductors

MLP neural network with an optimal architecture for modeling the ECAP-C process

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