LAUSR

Abstract The effect of Zn/Gd ratio on dynamic recrystallization (DRX) of Mg–2Gd–xZn (x = 0, 1, 2 and 3 wt%) alloys was investigated by shear punch tests in the temperature range of 623–723 K and shear strain rate range of 1.0 × 10−2–1.2 × 10−1 s−1. It was observed that at low Zn/Gd ratio, excessive co-segregation of Gd and Zn solute atoms retards recrystallization and provides higher strength. At high Zn/Gd ratios, precipitation reduces the co-segregation, so that the alloy with Zn/Gd = 1.5, experienced the fastest DRX and the lowest strength. In addition, segregation resulted in a weaker texture, by elimination of nucleation and growth of the preferred orientations.