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Experimental Study on Mechanical Properties of Commercially Pure Copper Processed by Severe Plastic Deformation Technique-Equal Channel Angular Extrusion
Abstract:The experiments have been conducted to study the mechanical properties of commercially pure copper processing at room temperature by severe plastic deformation using equal channel angular extrusion (ECAE) through a die of 90oangle up to 3 passes by route BC i.e. rotating the sample in the same direction by 90o after each pass. ECAE is used to produce from existing coarse grains to ultra-fine, equiaxed grains structure with high angle grain boundaries in submicron level by introducing a large amount of shear strain in the presence of hydrostatic pressure into the material without changing billet shape or dimension. Mechanical testing plays an important role in evaluating fundamental properties of engineering materials as well as in developing new materials and in controlling the quality of materials for use in design and construction. Yield stress, ultimate tensile stress and ductility are structure sensitive properties and vary with the structure of the material. Microhardness and tensile tests were carried out to evaluate the hardness, strength and ductility of the ECAE processed materials. The results reveal that the strength and hardness of commercially pure copper samples improved significantly without losing much ductility after each pass.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1123608Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1270
 Valiev R.Z., Estrin Y., Horita Z., Langdon T.G., Zehetbauer M.J., and Zhu Y.T. Producing bulk ultrafine-grained materials by severe plastic deformation, J. Met., 58(4) (2006), pp. 33–39.
 R. Z. Valiev, I. V. Alexandrov, Y. T. Zhu and T. C. Lowe, Paradox of Strength and Ductility in Metals Processed Bysevere Plastic Deformation, Journal of Materials Research / Volume 17 / Issue 01 / 2002, pp 5-8.
 R.Z. Valiev, Structure and mechanical properties of ultrafine-grained metals, Mater.Sci. Eng. A234–236 (1997) 59.
 I.V. Alexandrov, Y.T. Zhu, T.C. Lowe, R.K. Islamgaliev, R.Z. Valiev, Microstructures and properties of nanocomposites obtained through SPTS consolidation of powders, Metall. Mater. Trans. 29A (1998) 2253.
 V.V. Stolyarov, Y.T. Zhu, T.C. Lowe, R.Z. Valiev, A Two-Step SPD Processing of Ultrafine-Grained Titanium, Nanostruct. Mater. 11 (1999) 947.
 Ruslan Z. Valiev, Terence G. Langdon, Principles of equal-channel angular pressing as a processing tool for grain refinement, Progress in Materials Science, Volume 51, Issue 7, September 2006, Pages 881–981.
 Piotr Bazarnik, Barbara Romelczyk, Mariusz Kulczyk, and Małgorzata Lewandowska, The Strength and Ductility of 5483 Aluminium Alloy Processed by Various SPD Methods, Materials Science Forum Vol. 765 (2013) pp 423-428.
 Mckenzie, Lapovok. R., ECAP with back pressure for optimum strength and ductility in aluminium alloy 6016. Part 1: Microstructure. Acta Materialia, Volume 58, Issue 9, May 2010, Pages 3198-3211.
 Mckenzie, Lapovok. R., ECAP with back pressure for optimum strength and ductility in aluminium alloy 6016. Part 2: Microstructure. Acta Materialia, Volume 58, Issue 9, May 2010, Pages 3212-3222.
 Z. Horita, T. Fujinami, M. Nemoto, T.G. Langdon Improvement of mechanical properties for Al alloys using equal-channel angular pressing, Journal of Materials Processing Technology, Volume 117, Issue 3, 23 November 2001, Pages 288–292.
 R. B. Figueiredo, Z. C. Duan, M. Kawasaki, T. G. Langdon, Factors Influencing Ductility in Ultrafine-Grained Metals Processed by Equal-Channel Angular Pressing, Materials Science Forum, Vols 633-634, pp. 341-352, Nov. 2009.
 Zhilyaev. A.P., Oh-ishi. K., Raab. G.I., Mc Nelley. T.R., Influence of ECAP processing parameters on texture and microstructure of commercially pure aluminum. Materials Science and Engineering: A, Volume 441, Issues 1-2, 15 December 2006, Pages 245-252.
 Thiyagarajan, A. Gopinath, Enhancement of Mechanical Properties of AA 6351 Using Equal Channel Angular Extrusion (ECAE), Materials Science and Metallurgy Engineering, 2014, Vol. 2, No. 2, 26-30.
 C. X. Huang, W. P. Hu, Q. Y. Wang, C. Wang, G. Yang & Y. T. Zhu, An Ideal Ultrafine-Grained Structure for High Strength and High Ductility, Materials Research Letters, Volume 3, Issue 2, 2015, pages 88-94.
 Yoshinori Iwahashi, Jingtao Wang, ZenjiHorita, Minoru Nemoto, Terence G. Langdon, Principle of equal-channel angular pressing for the processing of ultra-fine grained materials, Scripta Materialia, Vol. 35, No. 2, pp. 143-146,1996.
 Aidang Shan, In-Ge Moon, Hung-Suk Ko, and Jong-Woo Park, Direct observation of shear deformation during equal channel angular pressing of pure aluminum, Scripta Materialia, Vol. 41, No. 4, pp. 353–357, 1999.
 V.M. Segal, Materials processing by simple shear, Materials Science and Engineering A197 (1995) 157 - 164.
 C. Pithan, T. Hashimoto, M. Kawazoe, J. Nagahora, K. Higashi, Microstructure and texture evolution in ECAE processed A5056, Materials Science and Engineering A280 (2000) 62–68.
 Dong Hyuk Shin, Chang Woo Seo, Jongryoul Kim, Kyung-Tae Park, Wung Young Choo, Microstructures and mechanical properties of equal-channel angular pressed low carbon steel, Scripta mater. 42 (2000) 695–699.
 Ehab A. El-Danaf, Mechanical properties and microstructure evolution of 1050aluminum severely deformed by ECAP to 16 passes, Materials Science and Engineering A 487 (2008) 189–200.
 Megumi Kawasaki, Zenji Horita, Terence G. Langdon, Microstructural evolution in high purity aluminum processed by ECAP, Materials Science and Engineering A 524 (2009) 143–150.
 R.Z. Valiev, E.V. Kozlov, Yu.F. Ivanov, J. Lian, A.A. Nazarov, B. Baudelet, “Deformation behaviour of ultra-fine-grained copper”, Actametall, mater. Vol. 42, No. 7, pp. 2467-2475, 1994.
 Kiyotaka Nakashima, Zenji Horita, Minoru Nemoto, Terence G. Langdon, Development of a multi-pass facility for equal-channel angular pressing to high total strains, Materials Science and Engineering A281 (2000) 82–87.
 PL Sun, PW Kao, CP Chang, Effect of deformation route on microstructural development in aluminum processed by equal channel angular extrusion, Metallurgical and Materials Transactions A, volume 35A, April 2004—1359.
 Minoru Furukawa, Yoshinori Iwahashi, Zenji Horita, Minoru Nemoto, Terence G. Langdon, “The shearing characteristics associated with equal-channel angular pressing”, Materials Science and Engineering A257 (1998) 328–332.
 Yoshinori Iwahashi1, Zenji Horita, Minoru Nemoto and Terence G. Langdon, The process of grain refinement in equal-channel angular pressing, Acta mater. Vol. 46, No. 9, pp. 3317-3331, 1998.