In this work, the development of AlZnMg(Cu) alloys was performed by thermodynamic simulations and experimental tests. With calculations, the solidification processes and phase compositions could be predicted. As secondary casting alloys, the selected compositions of AlZn4Mg3Cu(Fe) and AlZn5Mg4Cu have higher contents of alloying elements, such as iron and silicon, and were successfully processed with a cold-chamber die casting machine. In addition, an energy- and time-saving optimization of the material properties was performed by a modified heat treatment (T6*) with a total time of only 12 h. The alloys were evaluated based on the characterization of their mechanical properties and the analysis of their microstructures. In particular, the elimination of cost-intensive alloying elements and the application of a modified heat treatment method clearly show the potential of AlZnMg(Cu) die-cast alloys for future industrial use.

在这项工作中，通过热力学模拟和实验测试进行了AlZnMg（Cu）合金的开发。通过计算，可以预测凝固过程和相组成。作为二次铸造合金，所选的AlZn4Mg3Cu（Fe）和AlZn5Mg4Cu的成分具有较高的合金元素含量，例如铁和硅，并已通过冷室压铸机成功加工。另外，通过改进的热处理（T6 *）进行了材料特性的节能和省时的优化，总时间仅为12小时。根据合金的力学性能表征和微观结构分析对合金进行评估。尤其是，