High Mechanical Properties of Cast Quasicrystal-Reinforced Mg-Alloys

Abstract:

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Mg-8Zn-4Al-xY base alloys containing an icosahedral quasicrystal phase (i-phase) as a main strengthening phase were prepared by casting into a copper mould at moderate cooling rates. The Y addition was effective for decreasing the size of i-phase and the more homogeneousness of its dispersed state. The mechanical properties at room temperature were much superior to those of AZ91 alloy. The creep tests indicated a promising high temperature creep resistance of the quasicrystal-reinforced Mg-Zn-Al-Y cast alloy. The dislocation characteristic in crept specimens which containing i-phase and no i-phase was analyzed and strengthening mechanism was discussed.

Info:

Periodical:

Materials Science Forum (Volumes 488-489)

Edited by:

W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo

Pages:

127-130

DOI:

10.4028/www.scientific.net/MSF.488-489.127

Citation:

G. Y. Yuan et al., "High Mechanical Properties of Cast Quasicrystal-Reinforced Mg-Alloys", Materials Science Forum, Vols. 488-489, pp. 127-130, 2005

Online since:

July 2005

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Price:

$35.00

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