Mechanical anisotropy due to twinning in an extruded AZ31 Mg alloy

Tension/Compression Anisotropy in Hot Forged Mg-Al-Ca-RE Alloy

“…Chino et al 9,10) examined the relationship between the mechanical anisotropy and twinning behaviors in extruded AZ31 Mg alloy in detail and demonstrated that the tension/ compression anisotropy in wrought magnesium is considerably induced by twinning. There are many possible modes of twins for magnesium; 17,18) but at the initial stage of deformation, the {10-12}h10-11i c-axis expansion twinning tends to be dominant because of its low critical resolved shear stress.…”

“…There are many possible modes of twins for magnesium; 17,18) but at the initial stage of deformation, the {10-12}h10-11i c-axis expansion twinning tends to be dominant because of its low critical resolved shear stress. 9,17,19) Figure 6 is the result of EBSD analysis on the 2%-compressed forged-and-annealed sample, showing the generated twins during the 2% compression. The number fraction of misorientation angle is very high at approximately 86…”

“…6) It seems that the annealing had a small effect on the texture formed by hot forging. 9,14) Tensile test pieces with 6 mm in gauge length and 2 Â 2 mm 2 in gauge width, and compressive test pieces with 2.4 mm in height and 2 Â 2 mm 2 were cut from the samples. Tension and compression tests were carried out at room temperature with initial strain rate of 2:8 Â 10 À3 s À1 .…”

“…Hotworked Mg alloys often suffer from strong texture formation and subsequent mechanical anisotropy. [7][8][9][10][11][12] Hence, compressive properties as well as tensile properties must be considered for proper design and application of forged Mg alloy parts. In this study, the tension/compression anisotropy of hot upset-forged die-cast Mg-Al-Ca-RE (RE = rare earth) alloys is examined and compared to those of the unforged alloy.…”

Investigation on the Mechanical Properties of Mg-Al Alloys (AZ41 and AZ51) and Its Composites

“…AZ31 is the most widely used wrought magnesium alloy because of its good combination of strength, ductility and corrosion resistance [3]. Consequently, diverse research efforts were made on AZ31 alloy systems to attain further improvements in mechanical properties [7][8][9][10][11][12][13][14][15][16]. Slip and twinning mechanisms of these alloys were investigated by using the modeling technique [7] and by performing compression tests [8].…”