Orientation dependence of bending deformation behavior in magnesium single crystals

Abstract

Magnesium single crystals with different orientations were subjected to three-point bending tests, and bending deformation behavior was investigated. With the basal plane parallel to the neutral plane, the specimens deformed due to basal slips and showed gull-shape after deformation. Conversely, with the neutral plane and the axis parallel to (112-0) and [11-00], the specimen deformed due to {1012-} twinning. However, the specimens fractured after a few percent of deformation, subsequently displaying V-shape. The specimens, whose neutral plane and axis were (112-0) and [0001], also deformed due to basal slips. The relationship between bending yield stress of the specimens and the critical resolved shear stress of the basal slip, or {101-2} twin, is discussed.