Plastic Deformation Behavior in Magnesium Alloy Single Crystals

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Zn and Al are major alloying elements of Mg alloys. Main slip system of Mg is a basal slip and the CRSS increases with Zn or Al content. According to von-Mises criterion, five kinds of independent slip systems are required for uniform deformation, so it is necessary to activate non-basal slip systems to show good ductility. However, it has not become clear the effect of Zn or Al for non-basal slip systems yet. To investigate deformation behavior of magnesium crystal by non-basal slip, Mg-Zn and Mg-Al single crystals were stretched in the [110] direction and Mg-Zn single crystals were compressed in the [0001] direction. {112}<23> second order pyramidal slip was activated in Mg-0.1at%Zn and Mg-0.5at%Al. On the other hand, {101} twin was mainly activated in Mg-1.0at%Al alloy. Yield stress due to the pyramidal slip of magnesium decreased by 0.1at%Zn addition, however they increased with addition of aluminum..

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Periodical:

Materials Science Forum (Volumes 706-709)

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Edited by:

T. Chandra, M. Ionescu and D. Mantovani

Pages:

1122-1127

Citation:

S. Ando et al., "Plastic Deformation Behavior in Magnesium Alloy Single Crystals", Materials Science Forum, Vols. 706-709, pp. 1122-1127, 2012

Online since:

January 2012

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$38.00

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