A study of high ductility Mg-2Gd-0.4Zr magnesium alloy under monotonic tension at room temperature

The present study aimed to explore the deformation behavior of a highly ductile Mg-2Gd-0.4Zr alloy at room temperature. Tensile tests were carried out at room temperature, aiming to explore reasons for the high ductility through investigating deformation modes by quasi-in-situ electron backscatter diffraction-assisted slip trace analysis, texture evolution analysis and microstructure characterizing by scanning electron microscope and transmission electron microscope studies. The results show that the rare earth texture benefitted basal slip, the higher proportion of the non-basal slip compared to pure magnesium, the high grain boundary strength and the synergy between the twinning and dislocation contribute to the high ductility of this alloy. In addition, some local strain compatibility may also play a positive role.

Automated summary

The high ductility of the Mg-2Gd-0.4Zr alloy at room temperature is attributed to the rare earth texture, higher proportion of non-basal slip, high grain boundary strength, and synergy between twinning and dislocation. Local strain compatibility may also contribute to its high ductility.