The Thermal Diffusivity of Mg-Al-Sr and Mg-Al-Ca-Sr Sand Casting Magnesium Alloys

Andrzej Kiełbus; Tomasz Rzychoń; Grzegorz Moskal

doi:10.4028/www.scientific.net/DDF.326-328.249

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The Thermal Diffusivity of Mg-Al-Sr and Mg-Al-Ca-Sr Sand Casting Magnesium Alloys

Abstract:

In the present study, the thermal diffusivity of four sand casting magnesium alloys: Mg-9Al-1Zn, Mg-6Al-2Sr, Mg-9Al-1.5Ca-0.3Sr and Mg-9Al-2.2Ca-0.8Sr were studied. Sand casting was performed at 730-780°C temperatures. Thermal diffusivity was measured by a LFA 427 Netzsch apparatus. The thermal diffusivity of the investigated alloys was chemical composition and temperature dependent and increased with increasing temperature. The thermal diffusivity of Mg-Al-Ca-Sr alloys was higher than that of Mg-Al alloy, because the total volume fraction of intermetallic phases in alloys containing calcium and strontium is larger than that in Mg-Al alloy. The formation of intermetallic phases caused the consumption of the solute element in the α-Mg matrix, and improved the thermal diffusivity of the Mg-Al-Ca-Sr magnesium alloy.

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Periodical:

Defect and Diffusion Forum (Volumes 326-328)

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249-254

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https://doi.org/10.4028/www.scientific.net/DDF.326-328.249

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Online since:

April 2012

Authors:

Andrzej Kiełbus, Tomasz Rzychoń, Grzegorz Moskal

Keywords:

Magnesium Alloy, Mg-Al-Ca-Sr, Mg-Al-Sr, Sand Casting, Thermal Diffusivity

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