Microstructure and mechanical properties of AC AlSi9CuX alloys

• Autorzy: Dobrzański L. A. , Maniara R. , Krupiński M. , Sokolowski J. H.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In order to gain a better understanding of how to control the as-cast microstructure, it is important to understand the evaluation of microstructure during solidification and understanding how influence the changes of chemical concentration on this microstructure and mechanical properties. In this research, the effect of Cu content on the microstructure and mechanical properties of AC AlSi9CuX series alloys has been investigated. Design/methodology/approach: The experimental alloy used in this investigation were prepared at the University of Windsor (Canada) in the Light Metals Casting Laboratory, by mixing the AC AlSi5Cu1(Mg) commercial alloys and two master alloys AlSi49 and AlCu55, in a 10 kg capacity ceramic crucible. Optical microscope, transition electron microscope and scanning electron microscope were used to characterize the microstructure and intermetallic phases. Secondary dendrite arm spacing measurements were carried out using an Leica Q-Win(TM) image analyzer. Compression tests were conducted at room temperature using a Zwick universal testing machine. Rockwell F-scale hardness tests were conducted at room temperature using a Zwick HR hardness testing machine. Vickers microhardness tests were conducted using a DUH 202 microhardness testing machine. Findings: It was found that the increase of Cu content to 2 wt% leads to change of the Al+Si eutectic morphology, resulting in a grate increase in the ultimate tensile strength and ductility values compared to the alloys include 1 and 4 wt % of Cu. Based on the X-ray phase analysis was found, that change of Cu content don't influences on the phases composition of investigated alloy. Practical implications: The aim of this work is describe in detail the solidification process in a number of AC AlSi9CuX foundry alloys. In investigated alloys there were identified five phases, which can suggest together with thermal analysis, that in these alloys occur four solidification reactions. Originality/value: The carried out work confirmed the solidification reaction of AC AlSi9CuX foundry alloys and shown influence of Cu content on the microstructure and mechanical properties.

Słowa kluczowe

EN

mechanical properties; electron microscopy; X-ray phase analysis

PL

właściwości mechaniczne; mikroskopia elektronowa; rentgenowska analiza fazowa

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 24, nr 2
• Strony: 51--54
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Dobrzański L. A.

autor

Maniara R.

autor

Krupiński M.

autor

Sokolowski J. H.

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

Bibliografia

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