Guidance Analysis of Precipitated Phases Based on ZL205A Alloy Main Cluster Model

ZL205A is a type of complex alloy with excellent comprehensive mechanical properties. As there is a lack of research into the origin of its phase composition, research into the composition design of the ZL205A alloy has faced difficulties. This paper qualitatively characterizes the near-programmed atomic arrangement structure of multi-element alloy solid solution based on the "first nearest neighbor cluster plus connected atoms" model, thereby accurately expressing the solid solution near-programmed cluster spatial structure of ZL205A alloy in a quantitative manner. The results show that the solid solution cluster model of ZL205A is {[Al-Al12]Al2}12[Cu-Cu3.6Mn0.4Al8]Ti0.233Zr0.078Al1.689, this cluster model is accurate and reasonable, and the phase composition and element content of the model are consistent with the XRD verification results, SEM verification results and EDS verification results. The use of alloy solid solution near-program cluster model to guide the precipitation phase analysis of ZL205A alloy was realized.