Microstructure analysis of the modified casting magnesium alloys after heat and laser treatment

• Autorzy: Dobrzański L. A. , Tański T. , Domagała J. , Bonek M. , Klimpel A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In this paper there is presented the structure of the modeling cast magnesium alloy EN-MCMgAl6Zn1 as cast state, after heat treatment and laser treatment. Design/methodology/approach: The presented results concern X-ray qualitative and quantitative microanalysis as well as qualitative and quantitative X-ray diffraction method, light and scanning microscope. 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 750š10 °C, suitable for the manufactured material. The heat treatment involve the solution heat treatment (warming material in temperature 375° C by 3 hour, it elevation temperature to 430°C, warming by 10 hours) and cooling in different cooling mediums as well water, air and furnace. Laser surface melting was carried out with a high power diode laser (HDPL). Findings: The results of the metallographic examinations confirm the fact that the magnesium cast alloy MCMgAl6Zn1 is characterized by a microstructure of the . solid solution constituting the alloy matrix as well as the ß – Mg17Al12 discontinuous intermetallic phase in the forms of plates located mostly at grain boundaries. The results indicate that laser-melted layer contains the fine dendrites. The substrate grains are significantly coarses than in the laser surface remelting zone. 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. This investigation presents different speed rates feed by one process laser power and in this research was used one powder with the particle size over 5žm. Practical implications: This work helps to use the new developed laser treatment technique for alloying and remelting of magnesium cast alloys for new application. Originality/value: The originality of this work is based on applying of High Power Diode Laser for improvement of properties of the magnesium alloys.

Słowa kluczowe

EN

magnesium alloy; heat treatment; laser treatment; melting process; precipitation; structure

PL

stop magnezowy; obróbka termiczna; obróbka laserowa; natapianie; wytrącanie; struktura

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 32, nr 1
• Strony: 7--12
• Opis fizyczny: Bibliogr. 14 poz., rys., tabl.

Twórcy

autor

Dobrzański L. A.

autor

Tański T.

autor

Domagała J.

autor

Bonek M.

autor

Klimpel A.

• 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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