Shear Strain Model for Equal Channel Angular Pressing in High Elastic Extruded Plastics

Authors

  • N. A. Anjum University of Engineering and Technology, Taxila, Pakistan
  • M. Z. Khan Institute of Space Technology, Islamabad, Pakistan
  • M. Shah University of Engineering and Technology, Taxila, Pakistan
  • M. S. Khalil University of Engineering and Technology, Taxila, Pakistan
  • R. A. Pasha University of Engineering and Technology, Taxila, Pakistan
  • F. Qayyum University of Engineering and Technology, Taxila, Pakistan
  • W. Anwar Nescom, Islamabad, Pakistan

Abstract

This paper presents a novel model for plastic shear strain calculation in the Equal Channel Angular Pressing (ECAP). The model is particularly formulated to furnish for the elastic recovery after extrusion. Due to high elastic recovery after plastic deformation in polymers, the behavior of Teflon and Nylon is investigated at different temperatures as they are famous for their low coefficient of friction and wall friction effects. The main concentration is given to the basic principle of ECAP processing parameters such as strain, slip bands, and shearing patterns. In this research, a new engraved circle marking technique is used to trace the plastic deformation in the specimens. Afterwards, image analysis approach is applied to measure the deformation, strain and rotation after extrusion. The experimental results are validated with the ABAQUS based numerical simulation. A close conformity is found between them.

References

References

K. Xia and J. Wang, “Shear principal, and equivalent strains in

equal-channel angular deformationâ€, J. Metalrg. and Mat. Trans.

A, vol. 32A, no. 10, pp. 2639-2647, October 2001.

V. Segal, “Equal channel angular extrusion: from macromechanics

to structure formationâ€, J. of Mater. Sci. and Engg. A, vol. 271,

no. 1, pp. 322-333, May1999.

R.Z. Valiev, R. K. Islamgaliev and I.V. Alexandrov, “Bulk nanostructured materials from severe plastic deformationâ€, J. Progress

in Mat. Sci., vol. 45, no. 2, pp. 103-189, August 2000.

V. M. Segal, “Engineering and commercialization of equal channel

angular extrusion (ECAE)â€, J. Mater. Sci. and Engg. A, vol. 386,

no. 12, pp. 269-276, May 2004.

D.H. Shin, I. Kim, J. Kim, Y.S. Kim and S.L. Semiatin,

“Microstructure development during equal-channel angular

pressing of titaniumâ€, J. ActaMaterialia, vol. 51, no. 4, pp. 983-

, October 2003.

S. Oh and S. Kang, “Analysis of the billet deformation during

equal channel angular pressingâ€, J. Mater. Sci. and Engg. A,

vol. 343, no. 1, pp. 107-115, May 2003.

L. Zaharia, R. Comaneci, R. Chelariu and D. Luca, “A new severe

plastic deformation method by repetitive extrusion and upsettingâ€,

J. Mater. Sci. and Engg., vol. 595, pp. 135-142, December 2014.

V. Segal, "Materials processing by simple shear", J. Mater. Sci.

and Engg. A, vol. 197, pp. 157-164, September 1995.

J. Kim, H. Jeong, S. Hong, Y. Kim and W. Kim,“Effect of aging

treatment on heavily deformed microstructure of a 6061 aluminum

alloy after equal channel angular pressingâ€, J. Scripta mater. vol.

, no. 8, pp. 901-907, June 2001.

Patrick.B. Berbon, Nikolai K. Tsenev, Ruslan Z. Valiev, Minoru

Furukawa, Zenji Horita, Minoru Nemoto, and Terence

G. Langdon, “Fabrication of bulk ultrafine-grained materials

through intense plastic strainingâ€, J. Metalrg. and Mat. Trans. A,

vol. 29, no. 9, pp. 2237-2243, September 1998.

Z. Horita, M. Furukawa, M. Nemoto, A. Barnes and T. Langdon,

“Superplastic forming at high strain rates after severe plastic

deformationâ€, J. Acta. Mater, vol. 48, no. 14, pp. 3633-3640, May

Q. Jining, J.H. Han and Z.Guoding and J.C. Lee, “Characteristic of

textures evolution induced by equal channel angular pressing in

aluminum sheetsâ€, J. Scripta mater. vol. 51, no. 2, pp. 185-

, April 2004.

A.P. Zhilyaev, D.L. Swisher, K. Oh-ishi, T.G. Langdon and

T.R. McNelley, “Microtexture and microstructure evolution during

processing of pure aluminum by repetitive ECAPâ€, J. Mater. Sci.

and Engg. A, vol. 429, no. 1-2, pp. 137-148, May 2006.

J.K. Kim, H.K. Kim, J.W. Park and W.J. Kim, “Large

enhancement in mechanical properties of the 6061 Al alloys after a

single pressing by ECAPâ€, J. Scripta Mater. vol. 53, no. 10, pp.

-1211, August 2005.

F. Djavanroodi and M. Ebrahimi, “Effect of die channel angle,

friction and back pressure in the equal channel angular pressing

using 3D finite element simulationâ€, J. Mater. Sci. and Engg. A,

vol. 527, no. 45, pp. 1230-1235, September 2010.

O. Sanusi, D. Makinde and J. Oliver, “Equal channel angular

pressing technique for the formation of ultra-fine grained

structuresâ€, South African Journal of Science, vol 108, no. 9,

pp. 1-7, October 2012.

Y. Iwahashi, J. Wang, Z. Horita, M. Nemoto and T. G. Langdon,

“Principle of equal-channel angular pressing for the processing of

ultra-fine grained materialsâ€, J. Scripta Mater., vol. 35, no. 2,

pp. 143-146, October 1996.

H. S. Kim, P. Quang, M. H. Seo, S. I. Hong, K. H. Baik and H. R.

Lee, “Process modelling of equal channel angular pressing for

ultrafine grained materialsâ€, J. Mater Trans., vol. 45, no. 7,

pp. 2172-2176, February 2004.

V. Segal, “Severe plastic deformation: simple shear versus pure

shearâ€, J. Mater. Sci. and Engg. A, vol. 338, no. 1, pp. 331-344,

Q. Jining, Z. Di, Z. Guoding and J.-C. Lee, “Effect of temperature

on texture formation of 6061 aluminum sheet in equal-channel

angular pressingâ€, J. Mater. Sci. and Engg. A, vol. 408, no. 1-2,

pp. 79-84, July 2005.

P. Prangnell, C. Harris and S. Roberts, “Finite element modelling

of equal channel angular extrusionâ€, J. Scripta Materialia, vol. 37,

no. 7, pp. 983-989, April 1997.

J. Bowen, A. Gholinia, S. Roberts and P. Prangnell, “Analysis of

the billet deformation behaviour in equal channel angular

extrusionâ€, J. Mater. Sci. and Engg. A, vol. 287, no. 1, pp. 87-99,

January 2000.

I. Balasundar, M.S. Rao and T. Raghu, “Equal channel angular

pressing die to extrude a variety of materialsâ€, J. Mater & Design,

vol. 30, no. 4, pp. 1050-1059, July 2009.

P. K. Chaudhury, B. Cherukuri and R. Srinivasan, “Scaling up of

equal-channel angular pressing and its effect on mechanical

properties, microstructure, and hot workability of AA 6061â€,

J. Mater. Sci. and Engg. A, vol. 411, no. 1, pp. 316-318, May

Prangnell, C. Harris and S. Roberts, “Finite element modelling of

equal channel angular extrusionâ€, J. Scripta Mater., vol.37, no. 7,

pp. 983-989, April 1997.

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Published

13-12-2015

How to Cite

[1]
N. A. Anjum, “Shear Strain Model for Equal Channel Angular Pressing in High Elastic Extruded Plastics”, The Nucleus, vol. 52, no. 4, pp. 169–175, Dec. 2015.

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