Analysis of Crystallographic Orientation Changes during Deformation of Magnesium Single Crystals

Abstract

Magnesium single crystals of three dierent orientations were deformed by tension at room temperature to investigate the geometrical criterion resulting from the Schmid law for activation of basal and non-basal slip systems. Changes of crystallographic orientations of investigated single crystals were systematically measured during deformation and the geometrical criterion was examined in respect to the changes of crystallographic orientations during deformation. The geometrical criterion itself failed to explain lack of activity of non-basal slip systems in the deformed magnesium single crystals. Therefore the ratio of activation volumes of soft to hard slip systems is considered to be introduced for a better understanding of the deformation in hcp metals.

Acoustic emission study on the activity of slip and twin mechanisms during compression testing of magnesium single crystals

“…The activation of basal and non-basal slip, and twinning in Mg single crystals with different orientations was studied recently [13,14]. An analysis of the plasticity in Mg single crystals under localized contact using spherical nanoindentation was presented in [15][16][17].…”

Non-Equilibrium Crystallization of Monotectic Zn-25%Bi Alloy under 600 g

“…The texture obtained for the sample at 600 g (supergravity variant) ( Figure 14 ) has a strong character with two clearly outlined components with mutual twin correlation typical of hexagonal structures [ 33 , 35 , 36 ]. The main component with the ⟨0002⟩ axis tilted by ~10 degrees from CF and the growth direction parallel to and a weaker component with mutual twin orientation of four peaks along the circumference on figure (0002).…”