The influence of the heat treatment on the microstructure and properties of Mg-Al-Zn based alloys

• Autorzy: Dobrzański L. A. , Tański T. , Cizek L. , Madejski J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In the following paper there have been the structure and properties of the MCMgAl12Zn1, MCMgAl9Zn1, MCMgAl6Zn1, MCMgAl3Zn1 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±10°C, suitable for the manufactured material. The following results concern light and scanning microscopy, X-ray quantitative microanalysis and mechanical properties. Findings: The examined alloys in as-cast state characterize a microstructure of α solid solution constituting the alloy matrix, the β - Mg17Al12 intermetallic phase in the form of plates located mostly at grain boundaries as well as near needle eutectic precipitations Mg17Al12 (α + β). In the structure one can also observe, using the EDS system, big concentrations of silicon, manganese and iron. The ageing process has caused the precipitation of evenly distributed dispersive β secondary phase in the needle form. Practical implications: A good capability of damping vibrations and low inertia connected with a relatively low weight of elements have predominantly contributed to the employment of magnesium alloys for the fast moving elements and in locations where rapid velocity changes occur; some good examples may be car wheels, combustion engine pistons, high-speed machine tools, aircraft equipment elements, etc. 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

heat treatment; metallography; magnesium alloy; structure

PL

obróbka cieplna; metalografia; stop magnezu; struktura

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2009
• Tom: Vol. 36, nr 1
• Strony: 48--54
• Opis fizyczny: Bibliogr. 20 poz.

Twórcy

autor

Dobrzański L. A.

autor

Tański T.

autor

Cizek L.

autor

Madejski J.

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

Bibliografia

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