Ultrafine grain formation during equal channel angular extrusion in an Al-Mg-Si alloy

• Autorzy: Greger, M. , Kocich, R. , Čížek, L. , Kander, L.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The possibility of including a new methods into classical technologies is one of reasons which for writing this paper. Design/methodology/approach: Microstructural development of aluminium alloy 6082 during equal-channel angular pressing (ECAP). Analysis of structure was made by light microscopy and SEM analysis. Findings: This procedure makes it possible to obtain after 4 passes the grain size of approx. 1 μm. In order to obtain an optimum micro-structure it is necessary to apply more passes with turning of the sample between individual passes by 90° about the longitudinal axis. Research limitations/implications: In this process (ECAP) was one of head problems a impossibility of application other shapes material. One of eventuality solving in respect thereof is using DECAP process. Practical implications: Radii of rounding of working edges of extruding channel must correspond to conditions for laminar flow of metal. Originality/value: Aluminium alloy 6082 was used to ECAP process, and found to be that this material can to change substructure structure, mechanical properties, respectively. Achieved quality level of mechanical properties is a function of number of passes as well as used technological route.

Słowa kluczowe

PL

ECAP; prasowanie kątowe o jednakowych kanałach; ziarna ultradrobne

EN

shearing strain; ECAP; equal-channel angular pressing; ultrafine grain

• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 15, nr 1-2
• Strony: 181--185
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Greger, M.

• Faculty of Metallurgy and Materials Engineering, VŠB -Technical University Ostrava, 17. listopadu 15, CZ 708 33 Ostrava-Poruba, Czech Republic,

autor

Kocich, R.

• Faculty of Metallurgy and Materials Engineering, VŠB -Technical University Ostrava, 17. listopadu 15, CZ 708 33 Ostrava-Poruba, Czech Republic

autor

Čížek, L.

• Faculty of Metallurgy and Materials Engineering, VŠB -Technical University Ostrava, 17. listopadu 15, CZ 708 33 Ostrava-Poruba, Czech Republic

autor

Kander, L.

• Vítkovice - Research and Development, Pohraniční 693/31, CZ 706 02 Ostrava-Vítkovice, Czech Republic

Bibliografia

• [1] M. Bárcena, M.A. Pérez, J.P. Samper, M. Lopez, Study of roundness on cylindrical bars turned of aluminium –cooper alloys UNS A 92024, 13th International Conference AMME 2005, Gliwice-Wisła, 2005, 415-419.
• [2] I. Beyerlein, R.A. Lebensohn, C.N. Tome, Ultrafine Grained Materials II. TMS, Seattle, 2002, 585.
• [3] G. Mrowka, J. Sienawski, Influence of heat treatment on the microstructure and mechanical properties of 6005 and 6082 aluminium alloys, 13th International Conference AMME 2005, Gliwice-Wisła, 2005, 447-451.
• [5] M. Greger, M. Widomska, A. Hernas, R. Kocich, NANO 04, VUT Brno 2004.
• [6] V.M. Segal, Mat. Sci. and Eng., A197, 1995, 157.
• [7] M. Greger, R. Kocich, 6thScientific-technical Conference Material in Engineering practice ́05, TU Žilina, Herl’any 2005, 85.
• [8] M. Czechowski, Slow strain rate stress corrosion testing of friction stri welded joints of Al-Mg alloys, 13th International Conference AMME 2005, Gliwice-Wisła, 2005, 183-187.
• [9] M. Greger, L. Čížek, S. Rusz, I. Schindler, Aluminium ́03, Alusuisse Děčín, 2003, 288.