Microstructure and Properties of Sand Casting Magnesium Alloys for Elevated Temperature Applications

Abstract:

It is required of sand casting magnesium used for aircraft industry to be, among others, increasingly creep-resisting. This paper describes microstructure and properties of chosen magnesium sand casting alloys, intended for usage at ambient and elevated temperature. The first part describes the most popular magnesium alloy Mg-9Al-1Zn (AZ91), which, due to the presence of Mg17Al12 phase in its structure, can be used only up to the temperature of ~120°C. The second part describes Mg-5Y-4RE-Zr (WE54) alloy, which can be used at the temperature of up to ~250°C. Unfortunately, its usage is very limited due to high price. The third part characterizes Mg-3Nd-1Gd-Zr (EV31A) alloy, which has properties similar to Mg-5Y-4RE-Zr alloy, but lower price. This paper also discusses the potential applications of these alloys.

• Periodical: Solid State Phenomena (Volume 176)
• Pages: 63-74
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.176.63
• Online since: June 2011
• Authors: Andrzej Kiełbus
• Keywords: Elevated Temperature, Magnesium Alloy, Microstructure, Sand Casting

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