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The Role of Mn in Aluminium Alloys with a Higher Iron Content

Bolibruchová D., Podprocká R., Pastirčák R., Major-Gabryś K.

Archives of Metallurgy and Materials

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2018

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Vol. 63, iss. 4

1883--1888

EN

The paper deals with the influence of manganese in AlSi7Mg0.3 alloy with higher iron content. Main aim is to eliminate harmful effect of intermetallic – iron based phases. Manganese in an alloy having an iron content of about 0.7 wt. % was graded at levels from 0.3 to 1.4 wt. %. In the paper, the effect of manganese is evaluated with respect to the resulting mechanical properties, also after the heat treatment (T6). Morphology of the excluded intermetallic phases and the character of the crystallisation of the alloy was also evaluated. From the obtained results it can be concluded that the increasing level of manganese in the alloy leads to an increase in the temperature of the β-Al5FeSi phase formation and therefore its elimination. Reducing the amount of β-Al5FeSi phase in the structure results in an improvement of the mechanical properties (observed at levels of 0.3 to 0.8 wt. % Mn). The highest addition of Mn (1.4 wt.%) leads to a decrease in the temperature corresponding to the formation of eutectic silicon, which has a positive influence on the structure, but at the same time the negative sludge particles were also present.

2

The structure and properties of aluminium alloys matrix composite materials with reinforcement made of titanium skeletons

Dobrzański L. A., Dobrzańska-Danikiewicz A., Achtelik-Franczak A.

Archives of Materials Science and Engineering

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2016

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Vol. 80, nr 1

16--30

EN

Purpose: The aim of the article is to present the technology of the manufacturing of composite materials with aluminum alloys matrix with reinforcement made of titanium skeletons. This paper presents the structure and properties of these composite materials. Design/methodology/approach: Titanium skeletons manufactured by SLS technology for certain mechanical properties and geometrical features, subjected to infiltration of cast aluminium alloys: AlSi12, AlSi7Mg0.3 thereby obtain a composite materials AlSi12/Ti and AlSi7Mg0.3/Ti. Findings: The results of examinations of mechanical properties of aluminium alloys: AlSi12, AlSi7Mg0.3, titanium skeletons and composite materials AlSi12/Ti, AlSi7Mg0.3/Ti, show that the reinforcement of aluminium alloys AlSi12, AlSi7Mg0.3 with porous titanium skeletons has a beneficial effect on the mechanical properties of the composite materials AlSi12/Ti, AlSi7Mg0.3/Ti. Practical implications: The principal aim of modern composite materials with a reinforcement in the form of a porous metallic skeleton they are employed, among others, in the automotive, aviation, machine and space industry as well as in medicine. Originality/value: The use of SLS technology in combination with infiltration technology creates prospects production of composite materials having improved properties and a wide range of applicability.

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Badania nad doborem warunków obróbki cieplnej odlewniczych stopów aluminium gat. AlSi7Mg0,3 oraz AlSi10Mg0,3 w celu polepszenia ich jakości i własności eksploatacyjnych

Knych T., Mamala A., Uliasz P., Błotnicki M.

Rudy i Metale Nieżelazne

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2010

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R. 55, nr 1

18-25

PL

Artykuł poświęcony jest zagadnieniu optymalizacji parametrów technologicznych procesu otrzymywania wyrobów z odlewniczych stopów aluminium pod kątem możliwości uzyskania zespołu ponadstandardowych własności wyrobu, w tym przewodności cieplnej. Programem badań objęto stopy gatunku EN AC AlSi7Mg0,3 oraz EN AC AlSi10Mg0,3, które ze względu na swoje znakomite własności odlewnicze wykorzystywane są do produkcji skomplikowanych geometrycznie odlewów. Miejscem aplikacji odlewów z badanych stopów jest przemysł energetyczny, w którym takie wyroby stosuje się jako elementy konstrukcyjne radiatorów urządzeń elektroenergetycznych, co narzuca wymagany zespół własności mechanicznych (element konstrukcyjny) oraz fizycznych (przewodność cieplna stopu). Niniejsza praca realizowana jest przy współpracy z Zakładami Metalurgicznymi WSK Rzeszów.

EN

In this article presents the results of research on heat treatment parameters assigned to the foundry aluminium alloys. The aim of research is to obtain required heat conductivity property of the product used as heat sinks. The tests were done on species of alloy AlSi7Mg0.3 and AlSi10Mg0.3 which have good casting properties, this allows to use them in the manufacture of such products. Application of this products took place in energy industry, where such devices are used as structural elements for power engineering. This application imposes a number of requirements which are the mechanical and thermal conductivity. This work is implemented in cooperation with ZM WSK Rzeszów.