Research into the Impact of Magnesium Content in the AlSi7Mg Aluminum Cast Alloys on the Strength and Electrical Properties of the Material after Different Parameters of Heat Treatment Operations

Abstract:

The continuous development of manufacturing processes and techniques in the production of cast aluminum alloy products is possible due to research into casting materials and technologies as well as analyses of the impact of technological factors on the operational parameters of products. A novelty of recent years are the aluminum casting alloys, which are used for carrying electric power in high-voltage Gas Insulated Switchgears - GIS and in elements of hardware for transmission and distribution lines. Casting aluminum alloys occurring in the European standardization are primarily intended for mechanical application and, for this reason, the value of their electrical conductivity is generally omitted or given only for indication. Therefore, there is a justification for undertaking research into the development requirements for the group of alloys, for which electrical properties will be the primary criterion for qualitative acceptance. Hence, the aim of this work is to determine optimal addition of magnesium and heat treatment parameters of AlSi7Mg aluminum cast alloys, in order to achieve the most favorable set of electrical and mechanical properties.

• Periodical: Key Engineering Materials (Volume 641)
• Pages: 63-68
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.641.63
• Online since: April 2015
• Authors: Justyna Wiecheć*, Piotr Uliasz, Tadeusz Knych, Jakub Tatarczuch
• Keywords: AlSiMg Casting Alloys, Brinell Hardness, Electrical Conductivity, Heat Treatment

References

[1] R.X. Li, R.D. Li, Y.H. Zhao, L.Z. He , C.X. Li, H.R. Guan , Z.Q. Hu: Age-hardening behavior of cast Al–Si base alloy, Materials Letters 58 (2004) 2096– 2101.

DOI: 10.1016/j.matlet.2003.12.027

[2] K. Narayan Prabhu , B.N. Ravishankar : Effect of modification melt treatment on casting/chill interfacial heat transfer and electrical conductivity of Al-13% Si alloy, Materials Science and Engineering A360 (2003) 293-298.

DOI: 10.1016/s0921-5093(03)00467-2

[3] G.S. Kumar , G. Prasad , Review experimental determinations of the Lorenz number, Journal of Materials Science 28 (1993) 4261-4272.

[4] D. Apelian: Worldwide Report Aluminum Cast Alloys: Enabling Tools for Improved Performance, NADCA (2009).

[5] J.G. Kaufman, E.R. Rooy : Aluminum Alloy Castings. Properties, Processes and Applications, ASM International, (2004).

[6] S. Pietrowski: Crystallization, structure and properties of piston silumins, Wydawnictwo Politechniki Łódzkiej, Łódź 1999 (in Polish).

[7] PN EN 1706.

[8] www. matweb. com.

[9] J. Wiecheć., P. Uliasz , T. Knych, M. Piwowarska-Uliasz.: AlSiMg cast alloys for electrical applications, Rudy i Metale Nieżelazne ; 2013 R. 58 nr 6, s. 333–338 (in Polish).

DOI: 10.1007/978-3-319-48761-8_20

[10] Wiecheć J., Uliasz P., Knych T., Piwowarska-Uliasz M., Jarosz R.: The influence of chemical composition and parameters of heat treatment on the mechanical properties and electrical conductivity in hypoeutectic aluminum silicon alloys, Archives of Foundry Engineering 2013 vol. 13 spec. iss. 3, s. 179–184.

DOI: 10.1007/978-3-319-48761-8_20