Influence of strain on the copper structure under controlled deformation path conditions

• Autorzy: Niewielski G. , Kuc D. , Rodak K. , Grosman F. , Pawlicki J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: One of the methods of plastic deformation under complex deformation path conditions is compression with oscillatory torsion. The observable effects in the form of changing force parameters and structure changes confirm the possibility of deformation to a value many times higher than in the case of methods traditionally applied for forming. This article presents the results of the influence of compression with oscillatory torsion on structural phenomena occurring in copper deformed in such a way. Design/methodology/approach: The examinations were conducted at a compression/oscillatory torsion test stand. The structural examinations were conducted with the use of light and electron microscopy. Findings: In experimental investigations, a reduction of unit pressures was observed when compared to conventional compression. The structural examinations indicated substantial differences in the mechanisms of plastic deformation conducted in both conventional and combined way. Research limitations/implications: There are premises which show that a metallic material of a nanometric structure can be obtained in this way (top-down method), by the accumulation of great plastic deformation. Metallic materials characterized by grain size below 100nm are distinguished by unconventional properties. Further examinations should focus on conducting experiments in a way that would enable grain size reduction to a nanometric size. This will enable the cumulation of greater deformation in the material. Originality/value: The method of compression with oscillatory torsion is an original method developed at the Silesian University of Technology, owing to which it is possible to obtain high deformation values (SPD) without risking the loss of cohesion of the material. Thorough understanding of the changes taking place in the structure of metals subjected to compression with oscillatory torsion will allow the optimal choice of process parameters in order to achieve a gradual grain size reduction.

Słowa kluczowe

EN

nanomaterials; plastic forming; microstructure; compression with oscillatory torsion

PL

nanomateriały; obróbka plastyczna; mikrostruktura; kompresja z oscylacyjnym skręcaniem

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 17, nr 1-2
• Strony: 109--112
• Opis fizyczny: Bibliogr. 15 poz., rys., wykr.

Twórcy

autor

Niewielski G.

• Faculty of Materials Science and Metallurgy, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland

autor

Kuc D.

• Faculty of Materials Science and Metallurgy, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland

autor

Rodak K.

• Faculty of Materials Science and Metallurgy, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland

autor

Grosman F.

• Faculty of Materials Science and Metallurgy, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland

autor

Pawlicki J.

• Faculty of Materials Science and Metallurgy, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland

Bibliografia

• 1. K. Hyoung Seop, H. Sun Ig L. Young Shin A. Dubravina, I. Alexander, Deformaion behaviour of copper during a high pressure torsion process, Journal of Materials Processing Technology 2 (2003) 334-337.
• 2. K. Hyoung Seop, Finite element analysis of high pressure torsion processing, Journal of Materials Processing Technology 113 (2001) 617-621.
• 3. A.P. Zhilyaev (2003) Acta Materialia, 51, Experimental parameters influencing grain refinement and microstructural evolutin during high-pressure torsion. Elsevier, 753-765
• 4. K. Hyoung Seop, S. Min Hong, H. Sun Ig, Platic deformation analysis of metals during equal channel angular pressing, Journal of Materials Processing Technology 113 (2001) 622-626.
• 5. U. Chakkingal, P.F. Thomson, Development of micro-structure and texture during high temperature equel channel angular extrusion of aluminium, Journal of Materials Processing Technology 117 (2001) 169-177.
• 6. C.J. Luis Pérez, P. Gonzáles, Y. Garcés, Equel channel angular extrusion in a commercial Al-Mn alloy, Journal of Materials Processing Technology 143-144 (2003) 506-511.
• 7. D. Ferguson, W. Chen, R. Kuziak, S. Zając, New developments in the field of physical simulation of thermomechanical processing, Proceedings of the 5th Scientific Internation Conference on Materials Forming, ESAFORM, (ed. by Pietrzyk M.) AGH Kraków (2002) 599-602.
• 8. M. Richert, A. Korbel, The effect of strain lacalization on mechanical properties of A199,992 in the range of large deformation, Journal of Materials Processing Technology 53 (1995) 331-340.
• 9. R.Z. Valiev, R.K. Islamgaliev, Bulk nanostructured materials from severe plastic deformation, Progress in Materials Science 45 (2000) 106-107.
• 10. G.Salishchev, R. Zaripova, R. Galeev, O. Valiakhmetov , Nanocrystalline structure formation during severe plastic deformation in metals and their deforamtion behaviour, Nanostructured Materials 6 (1995) 913-916.
• 11. S.V. Dobatkin A.M. Arsenkin, Popov M.A., Production of bulk metallic nano- and submicrocrytalline materials by the method of severe plastic deformation, Metal Science and Heat Treatment 47 (2005) 188–192.
• 12. R. Valiev, A. Korznikov, V. Alexander, Nanomaterials produced by severe plastic deformation, Annales de Chimie Science des Materiaux 27 (2002) 1-2.
• 13. A. Belyakov, R. Kaibyshev, Structureal changes of ferritic stainless steel during severe plastic deformation, Nanostructure materials 6 (1995) 893-896.
• 14. F. Grosman, J. Pawlicki, Concepts of technological applications in controlled deformation of materials, Acta Metallurgica Slovaca, R.8., 1, (2002) 178-182.
• 15. F. Grosman, J. Pawlicki, Method of tesing materials sensitivity on the strain path changes, Proceedings of the 10th Scientific Internation Conference “Plasticity of Materials FORMING’2003”, Podlesice (2003) 57-61.