On the Creep Resistance of HPDC Mg-RE Based Alloys

Abstract:

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This paper presents an analysis, based on microstructural observations by transmission electron microscopy, of the influence of chemical composition on creep resistance of high pressure die casting (HPDC) Mg-4RE-0.6Zn alloys. The improved creep resistance, by increasing the Nd/La ratio of the rare earth (RE) mixture, is shown to be associated with the supersaturation of Nd solute in the -Mg matrix, evidenced by the formation of Nd-rich precipitates on dislocations after a thermal ageing treatment. The result indicates that solid solution/precipitation strengthening of the -Mg matrix is important to the creep resistance of HPDC Mg-RE based alloys.

Info:

Periodical:

Materials Science Forum (Volumes 618-619)

Edited by:

M.S. Dargusch & S.M. Keay

Pages:

453-458

DOI:

10.4028/www.scientific.net/MSF.618-619.453

Citation:

S. M. Zhu et al., "On the Creep Resistance of HPDC Mg-RE Based Alloys", Materials Science Forum, Vols. 618-619, pp. 453-458, 2009

Online since:

April 2009

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Price:

$35.00

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