Superplastic properties of magnesium alloys

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

Abstrakty

EN

Purpose: The paper summarises results of experiments aimed at development of structure of modified Mg-Al-Zn alloys at hot deformation. Design/methodology/approach: methods ARB and ECAP were used in the described experiment. It was proved that hardly forming materials could achieve very high plastic properties. Findings: After making plastics deformation, the using materials of alloys AZ61 and AZ91 analysed superplastics behaviour, it was certified by obtaining results, when ductility to rupture of alloy AZ91 was 418%, it is demonstrated at conclusion of the article. Research limitations/implications: The experiment proved big influence of previous plastics deformation to ending values of mechanical properties. It was verified that better results are at rolling in more steps compared to rolling in one pass. Practical implications: The low submission temperature at last pass through die it causes obtaining higher final properties. Originality/value: It was obtained the material about grain size d dsim 0,7 micrometres during using the technology of ECAP. Abreast of it the technology ARB enabled to get material of grain size in interval d dsim 1-10 micrometres. The second technology brings higher strength properties. Only 3 cycles were sufficient to lower original grain size under limit 10 micrometres.

Słowa kluczowe

EN

plastic forming; superplasticity; magnesium alloys; ECAP

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 22, nr 2
• Strony: 83--86
• Opis fizyczny: Bibliogr. 12 poz., fot., rys., tab.

Twórcy

autor

Greger M.

autor

Kocich R.

autor

Čižek L.

• VSB-Technical University Ostrava, 17. listopadu 15, 708 33 Ostrava-Poruba, Czech Republic,

Bibliografia

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• [7] H. Watanabe, T. Mukai, K. Higashi, Grain refinement and superplasticity in magnesium alloys Ultrafine Grained Materials, Proceedings, of the 2th Minerals, Metals & Materials Society Annual Meeting 2003 469-478.
• [8] L. Čižek, M. Greger, L.A. Dobrzanski, R. Kocich, I. Juřička, L. Pawlica, T.Taňski, Mechanical properties of magnesium alloy AZ 91 at elevated temperatures, Journal Achievements in Materials and Manufacturing Engineering, 18 (2006) 203-206.
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• [11] M. Greger, R. Kocich, L. Čižek, Forging and rolling of magnesium alloy AZ61, Proceedings of the 12th Scientific International Conference „Contemporary Achievements in Mechanics, Manufacturing and Materials Science CAM3S'2006" Gliwice - Zakopane , 2006, 64-68.
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