Ultrafine grained strips of CuCr0.6 alloy prepared by CRCS method

• Autorzy: Stobrawa J. P. , Rdzawski Z. M. , Głuchowski W. , Malec W.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this work was to evaluate the ability of a continuous repetitive corrugation and straightening (CRCS) technique in creating ultra fine grained copper-chromium strips as well as to determine their deformability, mechanical properties, deformation behaviour and microstructure evolution. Design/methodology/approach: Tests were performed with the 0.8 mm thick CuCr0.6 strips using original die set construction. The changes of mechanical properties as well as microstructure evolution versus number of deformation cycles were investigated. The microstructure was investigated using optical and electron microscopy (TEM and SEM equipped with EBSD). Findings: The obtained strengthening effects and observed microstructure changes have been discussed basing on the existing theories related to strengthening of ultra fine grained copper based materials. The CRCS process effectively reduced the grain size of a CuCr0.6 alloy strips, demonstrating the CRCS as a promising new method for producing ultra fine grained metallic strips. Research limitations/implications: Research results are limited to the initial material after annealing only. Further investigations should be aimed towards determination of CRCS sequence including deformation-precipitation-ageing influence on strengthening effect. Practical implications: A growing trend to use new copper-based functional materials is observed recently world-wide. Within this group of materials particular attention is drawn to those with ultra fine or nanometric grain size of a copper matrix, which exhibit higher mechanical properties than microcrystalline copper. Originality/value: The paper describes to the mechanical properties of precipitates strengthened ultra fine grained copper - chromium alloy strips obtained by original RCS method and to the microstructure evolution.

Słowa kluczowe

EN

mechanical properties; severe plastic deformation; ultra fine grained material; electron microscopy

PL

materiał ultradrobnoziarnisty; odkształcenie plastyczne zrywające; właściwości mechaniczne; mikroskopia elektronowa

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 33, nr 2
• Strony: 166--172
• Opis fizyczny: Bibliogr. 22 poz., rys., tabl.

Twórcy

autor

Stobrawa J. P.

autor

Rdzawski Z. M.

autor

Głuchowski W.

autor

Malec W.

• Non-Ferrous Metals Institute, ul. Sowińskiego 5, 44-100 Gliwice, Poland,

Bibliografia

• [1] J. Stobrawa, Z. Rdzawski, Deformation behavior of dispersion hardened nanocrystalline copper,Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 153-156.
• [2] J. Stobrawa, Z. Rdzawski, W. Głuchowski, Structure and properties of dispersion hardened submicron grained copper, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 195-198.
• [3] J. Stobrawa, Z. Rdzawski, Dispersion – strengthened nanocrystalline copper, Journal of Achievements in Materials and Manufacturing Engineering 24/2 (2007) 35-42.
• [4] J. P. Stobrawa, Z. M. Rdzawski, Microstructure and properties of nanocrystalline copper – yttria microcomposite, Journal of Achievements in Materials and Manufacturing Engineering 24/2 (2007) 83-86.
• [5] J. P. Stobrawa, Z. M. Rdzawski, Thermal stability of functional properties in dispersion and precipitation hardened selected copper alloys, Archives of Materials Science and Engineering 30/1 (2008) 17-20.
• [6] J. P. Stobrawa, Z. M. Rdzawski, Formation of a stable nanostructure n the copper-based materials, Proceedings of the 11th International Scientific Conference on Contemporary Achievement in Mechanics, Manufacturing and Materials Science, CAM3S’2005, Gliwice-Zakopane, 2005 (CD-ROM).
• [7] A. Mishra, V. Richard, F. Gregori, R. J. Asaro, M. A. Meyers, Microstructural evolution in copper processed by severe plastic deformation, Materials Science and Engineering A 410-411 (2005) 290-298.
• [8] A. Mishra, B. K. Kad, F. Gregori, M. A. Meyers, Microstructural evolution in copper subjected to severe plastic deformation: Experiments and analysis, Acta Materialia 55 (2007) 13-28.
• [9] X-W. Li, Q-W Jiang, Y. Wu, Y. Wang, Y. Umakoshi, Stress-Amplitude-Dependent Deformation Characteristics and Microstructures of Cyclically Stressed Ultrafine-Grained Copper, Advanced Engineering Materials 10/8 (2008) 720-726.
• [10] J. Gubicza, N. Q. Chinh, T. Csanadi, T. G. Langdon, T. Ungar, Microstructure and strength of severely deformed fcc metals, Materials Science and Engineering A 462 (2007) 86-90.
• [11] S. V. Dobatkin, J. A. Szpunar, A. P. Zhilyaev, J.-Y. Cho, A. A. Kuznetsov, Effect of the route and strain of equa-channel angular pressing on structure and properties of oxygen-free copper, Materials Science and Engineering A 462 (2005) 132-138.
• [12] Y. H. Zhao, X. Z. Liao, Y. T. Zhu, Z. Horita, T. G. Langdon, Influence of stacking fault energy on nanostructure formation under high pressure torsion, Materials Science and Engineering A 410-411 (2005) 188-193.
• [13] X. Sauvage, R. Pippan, Nanoscaled structure of a Cu-Fe composite processed by high-pressure torsion, Materials Science and Engineering A 410-411 (2005) 345-347.
• [14] Y. H. Zhao, Y. T. Zhu , X. Z. Liao, Z. Horita, T. G. Langdon, Influence of stacking fault energy on the minimum grain size achieved in severe plastic deformation torsion, Materials Science and Engineering A 463 (2007) 22-26.
• [15] M. Kulczyk, W. Pachla, A. Mazur, M. Suś-Ryszkowska, N. Krasilnikov, K.J. Kurzydłowski, Producing bulk nanocrystalline materials by combined hydrostatic extrusion and equal-channel angular pressing, Materials Science 25/4 (2007) 991-999.
• [16] A. Krishnaiah, U. Chakkingal, P. Venugopal, Applicability of the groove pressing technique for grain refinement in commercial purity copper, Materials Science and Engineering A 410-411/25 (2005) 337-340.
• [17] K. Peng, L. Su, L. L. Shaw, K.-W. Qian, Grain refinement and crack prevention in constrained groove pressing of two-phase Cu-Zn alloys, Scripta Materialia 56/11 (2007) 987-990.
• [18] Y. T. Zhu, H. Jiang, T. C. Love, A new route to bulk nanostructured materials, Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 32/6 (2001) 1559-1562.
• [19] J. Y. Huang, Y. T. Zhu, H. Jiang, T. C. Love, Microstructure and dislocation configuration in nanostructured Cu processed by repetitive corrugation and straightening, Acta Materialia 49 (2001) 1497-1505.
• [20] J. Huang, Y. T. Zhu, D. J. Alexander, X. Liao, T. C. Love, R. J. Asaro, Development of repetitive corrugation and straightening, Materials Science and Engineering A 371 (2004) 35-39.
• [21] Z. Rdzawski Z, Stobrawa J., Structure of coherent precipitates in aged copper alloys, Scripta Metallurgica 20 (1986) 341-344.
• [22] J. Stobrawa, Z. Rdzawski, Inhomogeneous precipitation in aged copper-chromium alloy,Scripta Metallurgica 21 (1987) 1269-1271.