Effect of high power diode laser surface melting and cooling rate on microstructure and properties of magnesium alloys

• Autorzy: Dobrzański L. A. , Tański T. , Domagała J. , Malara S. , Król M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The goal of this paper is to present the investigation results of MCMgAl12Zn1, MCMgAl9Zn1, MCMgAl6Zn1, MCMgAl3Zn1 cast magnesium alloy in as-cast state and after heat treatment, as well as after laser treatment and thermal analysis during melting and solidification cycles carried out using the Universal Metallurgical Simulator and Analyser. In the following paper the structure and properties were presented of the above mentioned magnesium cast alloys in as-cast state and after a heat treatment. Design/methodology/approach: A casting cycle of alloys was carried out in an induction crucible furnace using a protective salt bath Flux 12 was equipped with two ceramic filters at the melting temperature of 750š10°C, suitable for manufactured material. The following results concern scanning electron microscopy investigations in the SE observation mode, as well as using BSE modus for better phase contrast results, also quantitative microanalysis was applied for chemical composition investigations of the phases occurred. Findings: The analysis of the samples after the ageing process has confirmed that the microstructure of the magnesium cast alloy consists of the solid solution a - Mg (matrix) of the secondary phase b - Mg17Al12 equally located in the structure. The roughness of the surface treatment layer was varied with laser power and also scan rate. Research limitations/implications: According to the alloys characteristics, the applied cooling rate and alloy additions seem 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 ageing process. Practical implications: A desire to create as light vehicle construction as possible and connected low fuel consumption made it possible to make use of magnesium alloys as constructional material in automotive industry. Originality/value: The undertaken examinations aim at defining the influence of chemical composition and precipitation processes on the structure and casting magnesium alloy properties in its state and after heat treatment with a different content of alloy components.

Słowa kluczowe

EN

heat treatment; surface treatment; magnesium cast alloy; scanning electron microscope; roughness

PL

obróbka cieplna; obróbka powierzchni; stop odlewniczy magnezowy; mikroskop elektronowy skaningowy; chropowatość powierzchni

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 37, nr 2
• Strony: 238--257
• Opis fizyczny: Bibliogr. 27 poz., rys., tabl.

Twórcy

autor

Dobrzański L. A.

autor

Tański T.

autor

Domagała J.

autor

Malara S.

autor

Król M.

• 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,

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