Effect of Zn content on the microstructural stability and grain growth kinetics of fine-grained extruded Mg–Gd–Zn alloys

The effect of Zn content on grain growth kinetics of the fine-grained extruded Mg–2Gd–xZn (x = 0, 1, 2, 3 wt%) alloys was investigated by annealing of the as-extruded sheets in the temperature range of 623–723 K for various time durations. Microstructural observations revealed that by adding 1 wt% Zn, the grain growth is significantly hindered, while increasing the Zn content beyond 1 wt% accelerates the grain growth. Evaluation of solute atom...