Abstract
Mg-Al-Zn alloys of 2% Nd and without Nd, which produced by spray deposited method, were heat treated at different solid-solution and the same aging treatment. The microstructure and hardness were analyzed by SEM , XRD and HV tester. The experimental results showed that Nd can make the spray deposited magnesium matrix grains tiny evenly, formed the second phase particle Al3Nd, and increased the hardness value. With the rise of solution temperature, the hardness of without Nd magnesium alloy show that rise firstly and then fall rapidly, but the 2%Nd magnesium alloy hardness increase all the time with the rising of solution temperature, and the hardness value increase sharply to the highest 181Hv after 448°C/3h+205°C/24h.
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