Structure and properties of the Mg alloys in as-cast state and after heat and laser treatment

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

Abstrakty

EN

Purpose: The goal of this paper is to present the structure and properties of the magnesium cast alloys in as-cast state and after a heat treatment. Moreover in purpose of this paper is to extend a complex evaluation of magnesium alloys after laser surface treatment and the new methodology to determine the thermal characteristics of magnesium alloy using the novel Universal Metallurgical Simulator and Analyzer Platform (UMSA). Design/methodology/approach: Laser treatment of magnesium alloys alloyed with TiC, SiC, WC, VC, Al2O3 powders was carried out using a high power diode laser (HDPL). Experiments also were performed using the UMSA. Findings: The analysis of the thin foils after the ageing process has confirmed that the structure of the magnesium cast alloy consists of the Mg solid solution (matrix), of the secondary Mg17Al12 ß phase-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. The alloyed region has a fine microstructure with hard carbide particles. The structure of the alloyed zone is dendritic. Microhardness of laser alloyed surface layer with ceramic powders was significantly improved compared to alloy without laser treatment. The research of the thermal analysis shows that UMSA Technology Platform is an efficient tool for collection and calculate of thermal parameters. Research limitations/implications: Totally there are some restriction for use of ceramic powders for alloying, some powders as oxides and nitrides are not favorable for alloying because of their dissolution during the alloying process. Further tests should be carried out in order to examine different cooling rates and parameters of solution treatment process and aging process. Investigations using the UMSA devices should concentrate on proper assessment of influence of different solidification rates on microstructure and mechanical properties.Originality/value: The originality of this work is applying of High Power Diode Laser for alloying of magnesium alloy using hard powders and also the Universal Metallurgical Simulator and Analyzer Platform.

Słowa kluczowe

EN

magnesium alloy; casting; thermal analysis; high power diode laser

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2008
• Tom: Vol. 31, nr 2
• Strony: 123--147
• Opis fizyczny: Bibliogr. 26 poz., wykr.

Twórcy

autor

Dobrzański L.

autor

Tański T.

autor

Domagała J.

autor

Król M.

autor

Malara S.

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,

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