The effects of calcium (Ca) elements on the microstructure, mechanical properties and corrosion behavior of extruded AZ61-1Nd-xCa (x = 0, 0.5, 1, 2 wt.%) alloys were investigated. The Al-Nd phase and Al₂Ca particles are dynamically precipitated in the extruded alloys. The volume fraction of Al₂Ca precipitates increases with the increase of calcium content. Moreover, the addition of calcium can refine the grain size. The tensile strength of the studied alloys remains almost constant and their hardness increases with increasing the calcium content. Regretfully, the presence of Al-Nd phase and brittle Al₂Ca phase in the Ca-alloyed AZ61-Nd decreases significantly the elongation. The corrosion resistance of AZ61-1Nd alloy is conspicuously improved by the addition of 1 wt.% calcium, which is due to the uniformly and dispersedly distributed Al₂Ca phase acting as a physical barrier. In this work, AZ61-1Nd-1Ca alloy with moderate strength and low corrosion rate was obtained, which is considered as a candidate material for application in marine environment.

研究了钙 (Ca) 元素对挤压 AZ61-1Nd-xCa (x = 0, 0.5, 1, 2 wt.%) 合金的微观结构、机械性能和腐蚀行为的影响。Al-Nd相和Al ₂ Ca颗粒在挤压合金中动态析出。Al ₂ Ca析出物的体积分数随着钙含量的增加而增加。此外，钙的加入可以细化晶粒。所研究合金的抗拉强度几乎保持不变，其硬度随着钙含量的增加而增加。遗憾的是，Al-Nd相和脆性Al _2的存在Ca 合金化的 AZ61-Nd 中的 Ca 相显着降低了伸长率。AZ61-1Nd 合金的耐蚀性通过添加 1 wt.% 的钙而显着提高，这是由于均匀分散分布的 Al ₂ Ca 相作为物理屏障。在这项工作中，获得了具有中等强度和低腐蚀速率的 AZ61-1Nd-1Ca 合金，它被认为是在海洋环境中应用的候选材料。