Abstract—The evolution of the microstructure and phase composition of the eutectic Al–Zn–Mg–Fe–Ni alloy subjected to severe plastic deformation by high pressure torsion has been investigated during annealing. The deformation treatment has resulted in a composite with a nanostructured matrix, namely, an Al solid solution alloyed with zinc and magnesium, and comprising submicron Al₉FeNi aluminides. The sequence and the kinetics of post-deformation processes (recovery, aging, recrystallization) during the heating of the alloy to 400°C have been established. Heating to 200°C has been shown to preserve the nanostructural state and the high hardness (1100 MPa) of the alloy due to recovery and aging processes taking place simultaneously. The tendency to recrystallization increases with increasing temperature; and static recrystallization becomes the main relaxation process accompanied by grain growth (to 30 µm) and a decrease in hardness.

摘要—研究了​​在退火过程中受到高压扭转严重塑性变形的低共熔Al-Zn-Mg-Fe-Ni合金的微观结构和相组成的演变。变形处理产生了具有纳米结构基体的复合材料，该基体是与锌和镁合金化的Al固溶体，并且包含亚微米Al ₉FeNi铝化物。已经确定了将合金加热到400°C期间变形后过程（恢复，时效，再结晶）的顺序和动力学。由于恢复和时效过程同时进行，加热到200°C可以保持合金的纳米结构状态和高硬度（1100 MPa）。随着温度的升高，重结晶的趋势增加。静态再结晶成为主要的弛豫过程，伴随晶粒生长（至30 µm）和硬度降低。