Heat Resistance of Mg-Nd Based Casting Alloys Containing Gadolinium and Yttrium

Abstract:

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Influences of Gd or Y addition on microstructures and tensile properties at room and elevated temperatures were investigated for T6-treated Mg-3%Nd-0.5%Zn-0.4%Zr casting alloys, on the basis of experimental results from X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy, tensile and creep tests. Microstructures of the T6-treated alloys are characterized by recrystallized α-(Mg) grains containing various nano-sized precipitates such as Mg41Nd5, Zn2Zr3 and Zr particles. In T6 condition, most of added Gd and Y elements are dissolved in Mg41Nd5 precipitates rather than formation of new phases. Tensile properties and creep resistance of the Mg-3%Nd-0.5%Zn-0.4%Zr alloy are remarkably increased by the addition of Gd or Y, but their efficiencies are substantially the same.

Info:

Periodical:

Advanced Materials Research (Volumes 26-28)

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

137-140

DOI:

10.4028/www.scientific.net/AMR.26-28.137

Citation:

J. H. Jun et al., "Heat Resistance of Mg-Nd Based Casting Alloys Containing Gadolinium and Yttrium", Advanced Materials Research, Vols. 26-28, pp. 137-140, 2007

Online since:

October 2007

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Price:

$35.00

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[1] 8 Creep test : 200o C, 150MPa MNK MNK-2Gd MNK-2Y MNK-1Gd MNK-1Y Creep strain (%) Time (sec X 10 3 ).

DOI: 10.1007/springerreference_100558

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