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1
Content available Effect of Sb-Modification on the Microstructure and Mechanical Properties of Secondary Alloy 319
Medlen D., Bolibruchova D.
Archives of Metallurgy and Materials
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2016
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Vol. 61, iss. 2A
553--558
EN
319 alloy has been selected for the study in the present work due to its wide use in many applications. 319 alloy is used in automotive and aerospace industry for the complicated castings which must comply high strength requirements. In practice, the most common elements with the modifying effect are strontium, sodium and antimony. The addition of these elements leads to a change in the shape of eutectic silicon, resulting in an increase of the mechanical characteristics and the microstructure. An experimental program has been undertaken to explore the effect of antimony on chosen mechanical properties and the microstructure of investigated alloy. An analysis of the results of these experimental works is made in order to determine an optimum Sb (Al-10% Sb) addition to produce material exhibiting desirable properties. Experimental works have showed that the addition of the Al-10% Sb results in similar or even higher mechanical properties than the conventional 319 alloy. Based on the carried out experiments the best combination of mechanical properties has been achieved by the addition of 2 000 ppm Al-10% Sb.
2
Content available The influence of remelting on the properties of AlSi6Cu4 alloy modified by antimony
Medlen D., Bolibruchova D.
Archives of Foundry Engineering
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2012
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Vol. 12, iss. 1
81-86
EN
The paper deals with the problem of multiple remelting influence on AlSi6Cu4 alloy modified by antimony on chosen mechanical characteristics, microstructure and gas content. This foundry alloy is used mostly in automotive industry. Foundry Aluminum-Silicon alloys are also used in number of industrial weight sensitive applications because of their low weight and very good castability and good mechanical properties. Modifiers are usually added to molten aluminum-silicon alloys to refine the eutectic phase particle shape and improve the mechanical properties of the final cast products and Al-Si alloys cast properties.
3
Content available remote Influence of antimony on the mechanical properties and gas content of alloy AlSi6Cu4
Medlen D., Bolibruchova D.
Archives of Foundry Engineering
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2011
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Vol. 11, iss. 1
73-78
EN
Aluminium alloys based on Al-Si are used in automotive and aerospace industries. AlSi6Cu4 alloy is used the complicated castings, which must comply high strength requirements. Strength characteristics can also be affected by the modifiers: Na, Sr, Sb. In the literature is mentioned, that AlSi6Cu4 modified by sodium and strontium has negative effect - increases of the gas absorption. Modification of AlSi6Cu4 alloy by antimony, is still not mentioned in the literature. The article gives the effect of antimony on selected mechanical properties and gas content of foundry alloy AlSi6Cu4.
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