Influence of Al addition on structure of magnesium casting alloys

• Autorzy: Dobrzański L. A. , Tański T. , Čížek L.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In the following paper there have been the structure and properties of the MCMgAl9Zn1 magnesium cast alloy as-cast state and after a heat treatment presented. Design/methodology/approach: A casting cycle of alloys has been carried out in an induction crucible furnace using a protective salt bath Flux 12 equipped with two ceramic filters at the melting temperature of 750±10ºC, suitable for the manufactured material. The following results concern transmission and scanning microscopy, X-ray qualitative and quantitative microanalysis. Findings: The analysis of the thin foils after the ageing process has confirmed that the structure of the magnesium cast alloy consists of the solid solution α – Mg (matrix) of the secondary phase β – Mg17Al12 evenly located in the structure. The structure creates agglomerates in the form of needle precipitations, partially coherent with the matrix placed mostly at the grain boundaries. Research limitations/implications: According to the alloys characteristic, the applied cooling rate and alloy additions seems to be a good compromise for mechanical properties and microstructures, nevertheless further tests should be carried out in order to examine different cooling rates and parameters of solution treatment process and aging process. Practical implications: A desire to create as light vehicle constructions as possible and connected with it low fuel consumption have made it possible to make use of magnesium alloys as a constructional material in automotive industry. Originality/value: The undertaken examinations aim at defining the influence of a chemical composition and precipitation processes on the structure and casting magnesium alloy properties in its as-cast state and after heat treatment with a different content of alloy components.

Słowa kluczowe

EN

electron microscopy; metallography; magnesium alloys; structure

PL

mikroskopia elektronowa; metalografia; stopy magnezu; struktura

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 17, nr 1-2
• Strony: 221--224
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Dobrzański L. A.

• Division of Materials Processing Technology and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Tański T.

• Division of Materials Processing Technology and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Čížek L.

• Faculty of Metallurgy and Materials Engineering, Technical University of Ostrava, Tř. 17 Listopadu 15, 708 33 Ostrava, Czech Republic

Bibliografia

• [1] H. Baker, ASM Specialty Handbook. Magnesium and Magnesium Alloys, ed. Avedesian, ASM International, The Materials Information Society, USA 1999.
• [2] K.U. Kainer, Sb. Int. Congress Magnesium Alloys and their Application, Mnichov, 2000, pp. 3-8.
• [3] Fajkiel, P. Dudek, G. Sęk-Sas, Foundry engineering XXI c. Directions of metallurgy development and Ligot alloys casting, Publishers Institute of Foundry engineering, Cracow, 2002.
• [4] K.U. Kainem, Magnesium – Alloys and Technology, Wiley-VH, Weinheim, Germany, 2003.
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• [6] L. Čížek, M. Greger, L. Pawlica, L.A. Dobrzański, T. Tański, Study of selected properties of magnesium alloy AZ91 after heat treatment and forming, Journal of Materials Processing Technology, 157-158 (2004), pp. 466-471.
• [7] L.A. Dobrzański, T. Tański, W. Sitek, L. Čížek, Modeling of mechanical properties magnesium alloy, 12th Scientific International Conference on Achievements in Mechanical and Materials Engineering AMME’ 2003, Gliwice-Zakopane, 2003, pp. 293-296.
• [8] L.A. Dobrzański, T. Tański, L. Čížek, Influence of heat treatment on structure and properties of the casting magnesium alloys, 11th International Scientific Conferences on Contemporary ”Achievements in Mechanics and Materials Science CAM3S’, 2005”, Gliwice-Zakopane, 2005, pp. 283-289.
• [9] L.A. Dobrzański, T. Tański, L. Čížek, Influence of modification with chemical elements on structure of magnesium casting alloys, 13th Scientific International Conferences ”Achievements in Mechanical and Materials Engineering AMME’, 2005”, Gliwice-Wisła 2005, pp. 199-202.
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• [13] K. Iwanaga, H. Tashiro, H. Okamoto, K. Shimizu, Improvement of formability from room temperature to warm temperature in AZ31 magnesium alloy, Journal of Materials Processing Technology, 155–156 (2004), pp. 1313-1316.