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研究了添加不同含量的稀土Ce对AZ61A镁合金显微组织和力学性能的影响。结果表明,添加适量的稀土Ce能使AZ61A镁合金的基体组织分布均匀,晶粒细化;Ce与Al结合形成高熔点的稀土相Al4Ce,使β-Mg17A112相数量减少,但形态变细;稀土相Al4Ce呈块状或棒状弥散均匀分布于晶界周围,阻碍位错运动,显著改善AZ61A镁合金室温及高温状态下的力学性能。
The effects of adding different amounts of Ce on the microstructure and mechanical properties of AZ61A magnesium alloy were studied. The results show that the addition of proper amount of rare earth Ce can make the microstructure of AZ61A magnesium alloy be uniform and grain refinement. Ce and Al combine to form high-melting-point rare earth Al4Ce, the number of β-Mg17A112 phase decreases, Phase Al4Ce was massive or rod-shaped dispersion evenly distributed around the grain boundaries, impeding the dislocation movement, significantly improve AZ61A magnesium alloy at room temperature and high temperature mechanical properties.