The joining of aluminum (Al) to magnesium (Mg) alloys is a challenge due to the detrimental effects of formation of hard and brittle intermetallic compounds. This work investigates the joining of AA6061-T6 to AZ31B by microwave hybrid heating using zinc (Zn) powder, especially in the effect of susceptors on microstructure. It was observed that formation of Al-Mg intermetallic compounds was hindered, and a good metallurgical joint was achieved. A distinct reaction zone was formed between the Zn interlayer and AZ31B. The use of graphite susceptor exhibited faster joint formation than when activated charcoal was used. However, graphite susceptor formed irregular reaction zone, whereas activated charcoal produced an uniform reaction zone. Elemental analysis concluded the formation of a solid solution of Mg + MgZn on the reaction zone. The width of the Mg-Zn reaction layer increased with the increase in microwave exposure time. Toward the AA6061- Zn faying surface of the interlayer, a Zn solid solution was formed having no intermetallic compounds and no reaction layer. Zn solid solution zone compromised the mechanical strength of the joint. The optimum value of microwave exposure time, clamping pressure and epoxy% was studied to achieve the highest joint strength.

由于形成硬而脆的金属间化合物的不利影响，铝 (Al) 与镁 (Mg) 合金的接合是一项挑战。这项工作研究了使用锌 (Zn) 粉末通过微波混合加热将 AA6061-T6 连接到 AZ31B，特别是基座对微观结构的影响。据观察，Al-Mg 金属间化合物的形成受到阻碍，并获得了良好的冶金接头。在 Zn 夹层和 AZ31B 之间形成了一个明显的反应区。与使用活性炭相比，石墨基座的使用表现出更快的接头形成。然而，石墨感受器形成不规则的反应区，而活性炭产生均匀的反应区。元素分析得出结论，在反应区形成了 Mg + MgZn 固溶体。Mg-Zn反应层的宽度随着微波照射时间的增加而增加。朝向中间层的AA6061-Zn接合面，形成Zn固溶体，没有金属间化合物，也没有反应层。Zn 固溶区损害了接头的机械强度。研究了微波暴露时间、夹紧压力和环氧树脂百分比的最佳值以获得最高的接合强度。