Investigation on the Deformation Behavior and Strain Distribution of Commercially Pure Aluminum after Circular Simple Shear Extrusion

Document Type : Research Paper

Authors

Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran

Abstract

Circular simple shear extrusion process was introduced as a new geometry for simple shear extrusion technique to fabricate ultrafine-grained materials. Similar to the simple shear extrusion method, this process is also based on direct extrusion, and the samples deform in a simple shear manner. In this investigation, the simulations were carried out using the commercial finite element code ABAQUS/Explicit and the process was performed experimentally on commercially pure aluminum (AA1050) samples. Besides, the optimized length of the deformation channel was measured, 26 mm using the commercial simulation package DEFORM 3D. The effects of back-pressure and processing routes on deformation behavior and hardness homogeneity were studied in the simulation and experiment. Uniaxial compression test, X-ray diffraction, and Vickers microhardness test were performed on the samples to determine the mechanical and microstructural properties. The experimental results were in good agreement with the ones obtained by simulation. It was found that in the practical approach with the absence of back-pressure, route D had the most homogeneous distribution of strain in the cross-section and throughout the length of the samples. The results of compression and microhardness tests showed that the mechanical properties of the samples were improved compared to the annealing state. Also, a significant reduction in crystallite size can be seen in the XRD results leading to an average crystallite size of 103 nm after 10 passes.

Keywords

References

1.            Valiev RZ, Islamgaliev RK, Alexandrov IV. Bulk nanostructured materials from severe plastic deformation. Progress in Materials Science. 2000;45(2):103-89.
2.            Fatemi M, Zarei-Hanzaki A. Review on ultrafined/nanostructured magnesium alloys produced through severe plastic deformation: microstructures. Journal of Ultrafine Grained and Nanostructured Materials. 2015 Dec 1;48(2):69-83.
3.            Valiev RZ, Langdon TG. Principles of equal-channel angular pressing as a processing tool for grain refinement. Progress in Materials Science. 2006;51(7):881-981.
4.            Torabi M, Eivani AR, Jafarian H, Salehi MT. Re-strengthening in AA6063 Alloy During Equal Channel Angular Pressing. Journal of Ultrafine Grained and Nanostructured Materials. 2017 Dec 1;50(2):90-7.
5.            Zhilyaev A, Langdon T. Using high-pressure torsion for metal processing: Fundamentals and applications. Progress in Materials Science. 2008;53(6):893-979.
6.            Mohammad Nejad Fard N, Mirzadeh H, Mohammad R, Cabrera JM. Accumulative roll bonding of aluminum/stainless steel sheets. Journal of Ultrafine Grained and Nanostructured Materials. 2017 Jun 1;50(1):1-5.
7.            Shin DH, Park J-J, Kim Y-S, Park K-T. Constrained groove pressing and its application to grain refinement of aluminum. Materials Science and Engineering: A. 2002;328(1-2):98-103.
8.            Beygelzimer Y, Varyukhin V, Synkov S, Orlov D. Useful properties of twist extrusion. Materials Science and Engineering: A. 2009;503(1-2):14-7.
9.            Pardis N, Ebrahimi R. Deformation behavior in Simple Shear Extrusion (SSE) as a new severe plastic deformation technique. Materials Science and Engineering: A. 2009;527(1-2):355-60.
10.          Bagherpour E, Reihanian M, Ebrahimi R. On the capability of severe plastic deformation of twining induced plasticity (TWIP) steel. Materials & Design (1980-2015). 2012;36:391-5.
11.          Tork NB, Pardis N, Ebrahimi R. Investigation on the feasibility of room temperature plastic deformation of pure magnesium by simple shear extrusion process. Materials Science and Engineering: A. 2013;560:34-9.
12.          Ebrahimi R, Rezvani A, Bagherpour E. Circular simple shear extrusion as an alternative for simple shear extrusion technique for producing bulk nanostructured materials. Procedia Manufacturing. 2018;15:1502-8.
13.          Rezvani A, Bagherpour E, Ebrahimi R. Circular Simple Shear Extrusion as an Alternative to Simple Shear Extrusion Technique. Iranian Journal of Science and Technology, Transactions of Mechanical Engineering. 2018.
14.          Ebrahimi R, Pardis N. Determination of strain-hardening exponent using double compression test. Materials Science and Engineering: A. 2009;518(1-2):56-60.
15.          Ungár T, Dragomir I, Révész Á, Borbély A. The contrast factors of dislocations in cubic crystals: the dislocation model of strain anisotropy in practice. Journal of Applied Crystallography. 1999;32(5):992-1002.
16.          Ebrahimi R, Najafizadeh A. A new method for evaluation of friction in bulk metal forming. Journal of Materials Processing Technology. 2004;152(2):136-43.
17.          Molaei S, Ebrahimi R, Abbasi Z. Upper Bound Analysis of Barrel Compression Test Using a New Velocity Field. Iranian Journal of Science and Technology, Transactions of Mechanical Engineering. 2016;40(1):1-10.
18.          Molaei SH, Shahbaz M, Ebrahimi R. The relationship between constant friction factor and coefficient of friction in metal forming using finite element analysis. Iranian Journal of Materials Forming. 2014 Oct 1;1:14-22.
19.          ABAQUS™/CAE User's Manual. Dassault Systems. ABAQUS™ Ver. 6.14
 
20.          DEFORMTM 3D Version.11. User’s manual scientific forming technologies corporation.
21.          Pardis N, Ebrahimi R. Different processing routes for deformation via simple shear extrusion (SSE). Materials Science and Engineering: A. 2010;527(23):6153-6.
22.          Qiao XG, Starink MJ, Gao N. Hardness inhomogeneity and local strengthening mechanisms of an Al1050 aluminium alloy after one pass of equal channel angular pressing. Materials Science and Engineering: A. 2009;513-514:52-8.
23.          Xu C, Horita Z, Langdon T. The evolution of homogeneity in processing by high-pressure torsion. Acta Materialia. 2007;55(1):203-12.
24.          Reihanian M, Ebrahimi R, Tsuji N, Moshksar MM. Analysis of the mechanical properties and deformation behavior of nanostructured commercially pure Al processed by equal channel angular pressing (ECAP). Materials Science and Engineering: A. 2008;473(1-2):189-94.
25.          Bagherpour E, Qods F, Ebrahimi R, Miyamoto H. Microstructure quantification of ultrafine grained pure copper fabricated by simple shear extrusion (SSE) technique. Materials Science and Engineering: A. 2016;674:221-31.
 
Journal of Ultrafine Grained and Nanostructured Materials
Volume 52, Issue 1
June 2019
Pages 32-42

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History

  • Receive Date: 20 January 2019
  • Revise Date: 11 March 2019
  • Accept Date: 25 March 2019

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