Influence of Copper Addition on the Mechanical Properties and Corrosion Resistance of Self-Hardening Secondary Aluminium Alloy AlZn10Si8Mg

Aluminium alloys have a wide range of applications, mainly due to their advantageous strength-to-weight ratio, denoted as specific strength and corrosion resistance. In recent decades, there has been a notable surge in the usage of recycled alloys, attributed to their reduced production costs and em...

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Bibliographic Details
Published in:Metals (Basel ) 2024-07, Vol.14 (7), p.776
Main Authors: Mikolajčík, Martin, Kuchariková, Lenka, Tillová, Eva, Sanchez, Jon Mikel, Šurdová, Zuzana, Chalupová, Mária
Format: Article
Language:English
Subjects:
Air hardening
Alloying elements
Alloys
Aluminum base alloys
AlZn10Si8Mg
Atmospheric corrosion
Automobile industry
Brinell hardness
Cooling
Copper
Corrosion effects
Corrosion products
Corrosion resistance
Corrosion resistant alloys
Corrosion tests
Diamond pyramid hardness
Ductility
effect of Cu
Iron
Mechanical properties
Melts
Metal fatigue
Metal scrap
Morphology
Optical properties
Production costs
recycled aluminium
Recycled materials
Recycling
secondary aluminium alloys
self-hardening alloys
Strength to weight ratio
Temperature
tensile
Tensile tests
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Summary:Aluminium alloys have a wide range of applications, mainly due to their advantageous strength-to-weight ratio, denoted as specific strength and corrosion resistance. In recent decades, there has been a notable surge in the usage of recycled alloys, attributed to their reduced production costs and emissions. One of the conditions for secondary production is the optimal sorting of used scrap. Once the aluminium scrap has been melted, it is tough to reduce the content of the various additives. Copper is the primary alloying element in some aluminium alloys, which leads to an increased amount of copper in the aluminium scrap. Therefore, it is important to investigate its effect on the properties of aluminium alloys in which it is not commonly present. For this reason, this paper is concerned with the influence of copper on the microstructure and properties of the secondary aluminium alloy AlZn10Si8Mg. Specifically, it compares two melts of self-hardening AlZn10Si8Mg alloys differing in copper content (0.019% and 1.72%). A complex quantitative and metallographic analysis by optical and electron microscopy has been performed. Mechanical properties were investigated by tensile test, Brinell hardness, and Vickers microhardness measurements. The corrosion resistance of the individual melts was verified by the Audi test.
ISSN:2075-4701
2075-4701
DOI:10.3390/met14070776