Intermetallic phase particles in cast AlSi5Cu1Mg and AlCu4Ni2Mg2 aluminium alloys

• Autorzy: Mrówka-Nowotnik G.
• Języki publikacji: PL

Abstrakty

EN

Purpose: In the technical Al alloys even small quantity of impurities - Fe and Mn - causes the formation of new phase components. Intermetallic particles form either on solidification or whilst the alloy is at a relatively high temperature in the solid state, e.g. during homogenization, solution treatment or recrystallization. The exact composition of the alloy and casting condition will directly influence the selection and volume fraction of intermetallic phases. The main objective of this study was to analyze the morphology and composition of complex microstructure of intermetallic phases in cast AlSi5Cu1Mg and AlCu4Ni2Mg2 aluminium alloys. Design/methodology/approach: In this study, several methods were used such as: optical light microscopy (LM), scanning (SEM) electron microscopy in combination with X-ray analysis (EDS) using polished sample, and X-ray diffraction (XRD) to identify intermetallics in cast AlSi5Cu1Mg and AlCu4Ni2Mg2 aluminum alloys. Findings: The results show that the microstructure of cast AlSi5Cu1Mg and AlCu4Ni2Mg2 aluminum alloys in T6 condition consisted a wide range of intermetallic phases. By using various instruments (LM, SEM, XRD) and techniques (imagine, EDS) following intermetallic phases were identified: Β-Al5FeSi, α-Al15(FeMn)3Si - in AlSi5Cu1Mg alloy and Al7Cu4Ni, Al12Cu23Ni, Al2CuMg, AlCuFeNi - in AlCu4Ni2Mg2 alloy. Research limitations/implications: In order to complete and confirm obtained results it is recommended to perform further analysis of the investigated aluminium alloys. Therefore it is planned to include in a next studies, microstructure analysis of the alloys by using transmission electron microscopy technique (TEM). Practical implications: Since the morphology, crystallography and chemical composition affect the intermetallic properties, what involves changes of alloy properties, from a practical point of view it is important to understand their formation conditions in order to control final constituents of the alloy microstructure. Originality/value: This paper proposes the best experimental techniques for analysis of the intermetallic phases occurring in the cast AlSi5Cu1Mg and AlCu4Ni2Mg2 aluminium alloys. This study has showed that the chemical phenol extraction method for the cast aluminium alloy is applicable.

Słowa kluczowe

PL

stopy metaliczne; mikrostruktura; mikroskopia elektronowa; faza międzymetaliczna

EN

metallic alloys; microstructure; electron microscopy; intermetetallic phases

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2009
• Tom: Vol. 38, nr 2
• Strony: 69--28
• Opis fizyczny: Bibliogr. 28 poz.

Twórcy

autor

Mrówka-Nowotnik G.

• Department of Materials Science, Rzeszów University of Technology, ul. W. Pola 2, 35-959 Rzeszów, Poland,

Bibliografia

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