Mechanisms for enhanced plasticity in magnesium alloys

Twinning, recrystallization and texture development during multi-directional impact forging in an AZ61 Mg alloy

“…Recently, many studies have already been devoted to the issue on twinning and DRX behavior in Mg alloys during thermomechanical deformation such as rolling and extrusion. Zhu et al [13] applied thermomechanical plain-strain simulations to investigate microstructural evolution of a ZK60 Mg alloy during high strain-rate rolling process and proposed that high propensity of twinning at high strain rates provided nucleation sites for DRX at the initial strain, finally resulting in a fully DRXed microstructure. Ma et al [14] found that twinning still plays an important role in DRX in an AZ61 Mg alloy during extrusion even at 450 ο C. Furthermore, Ma et al [15] investigated the texture M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 3 evolution during DRX in an extruded AM30 Mg alloy at 450 ο C and found that twinning significantly contributed to the microstructure and texture at relatively high strain rates.…”

Influence of specimen size and sheet thickness on the material behavior of AZ31B under uniaxial tension

“…A similar influence of the grain size on the elongation behavior at 200 °C is presented by Mabuchi et al [12]. Zhu et al explained the increase of the yield stress by the effect of twinning, where the critical resolved shear stress (CRSS) increases significantly with a decrease of grain size [13]. Thus, additional observations on the microstructure are needed to analyze the material behavior for different sheet thicknesses.…”

Enhancing the Strength and Ductility in Mg–Zn–Ce Alloy through Achieving High Density Precipitates and Texture Weakening

“…[35][36][37][38][39][40] The reason was related to the coarse DRXed grains. However, the peak-aged Mg-6Zn-0.2Ce alloy exhibited a rather weaker texture, which would reduce the stress required to activate the basal slip and prismatic slip [46] and provided more activated slip systems during deformation. For example, when the grain size was reduced from 5 to 1.8 mm, the yield strength was increased by 50 Mpa.…”