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Mold Temperature and Its Effect on Selected Properties of Cast AlSi5Cu2Mg Alloy

Širanec L., Bolibruchová D., Chalupova M.

Archives of Foundry Engineering

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2022

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Vol. 22, iss. 2

57--62

EN

The European Commission's ambitious plan to reduce CO2 emissions has a significant impact on the global automotive industry. Recent development of new diesel and petrol engines with direct injection is aimed at improving fuel efficiency while maintaining (or enhancing) engine performance. This naturally also increases the demands on the properties of the most stressed engine components (e.g., cylinder heads, engine blocks, pistons), which leads to the development of new materials. Presented work analysed the effect of different mold temperatures (60; 120; 180 °C) on mechanical, physical properties and microstructure of AlSi5Cu2Mg aluminium alloy. This alloy is currently being used for the production of cylinder head castings. The results showed that the changing mold temperature had an effect on mechanical properties (ultimate tensile strength and Young modulus values). SEM with EDX analysis of intermetallic phases revealed there were no size and morphology changes of Cu, Mg and Fe intermetallic phases when the mold temperature changed. No significant effect of different mold temperature on physical properties (thermal and electrical conductivity) and fracture mechanism occurred during experiment. Optimal combination of mechanical and physical properties of AlSi5Cu2Mg alloy was achieved using a permanent mold with temperature ranging from 120 to 180 °C.

2

Influence of the selected alloy additions on limiting the phase [alpha] formation in Cu-Zn alloys

Kozana J., Rzadkosz S., Piękoś M.

Archives of Foundry Engineering

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2010

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Vol. 10, iss. 1

221-225

EN

Influence of the selected alloy additions into copper and zinc alloys was investigated in order to find out the possibility of limiting the precipitation of unfavourable phase [gamma]. The observation of microstructures and strength tests were performed. The results of metallographic and strength investigations indicate positive influence of small amounts of nickel, cobalt or tellurium. The precise determination of the influence of the selected alloy additions on limiting the gamma phase formation will be the subject of further examinations.

3

Refining processes of selected copper alloys

Rzadkosz S., Kranz M., Nowicki P., Piękoś M.

Archives of Foundry Engineering

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2009

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Vol. 9, iss. 2

29-34

EN

The analysis of the refining effectiveness of the liquid copper and selected copper alloys by various micro additions and special refining substances - was performed. Examinations of an influence of purifying, modifying and deoxidation operations performed in a metal bath on the properties of certain selected alloys based on copper matrix - were made. Refining substances, protecting-purifying slag, deoxidation and modifying substances containing micro additions of such elements as: zirconium, boron, phosphor, sodium, lithium, or their compounds introduced in order to change micro structures and properties of alloys, were applied in examinations. A special attention was directed to macro and micro structures of alloys, their tensile and elongation strength and hot-cracks sensitivity. Refining effects were estimated by comparing the effectiveness of micro structure changes with property changes of copper and its selected alloys from the group of tin bronzes.

4

Wpływ składu chemicznego na strukturę i właściwości stopów na osnowie fazy międzymetalicznej TiAl

Szkliniarz W., Mikuszewski T., Juszczyk B.

Inżynieria Materiałowa

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2003

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R. XXIV, nr 6

392-395

PL

W pracy przedstawiono charakterystykę wpływu poszczególnych składników stopowych na strukturę i właściwości dwufazowych stopów na osnowie fazy międzymetalicznej TiAl. Scharakteryzowano także skład chemiczny i właściwości różnych generacji stopów. Na tej podstawie sformułowano zalecenia pomocne podczas projektowania i efektywnego doboru składu chemicznego inżynierskich stopów należących do tej grupy. W części badań własnych określono wpływ zawartości Al na strukturę i właściwości dwuskładnikowych stopów Ti-Al, stwierdzając, że poprzez zmiany zawartości Al można kształtować skład fazowy, strukturę i właściwości dwufazowych stopów na osnowie fazy międzymetalicznej TiAl.

EN

In this work presented characterization the effect of selected alloys elements on the microstructure and properties of intermetallic TiAl based alloys. Characterized also chemical composition and properties of different generation alloys. Based on this formulated the recommendations helped for designing and effective selection of chemical composition engineering alloys of this group. In own investigation defined effect of Al content on the structure and properties of two phase alloys based on the Ti-Al system, it was stated, that changing of Al content can be effective way to forming the phase composition, microstructure and properties of two-phase intermetallic TiAl based alloys.