Optimizing the Mechanical and Microstructure Characteristics of Stir Casting and Hot-Pressed AA 7075/ZnO/ZrO₂ Composites

Table 1

Stir-cast progression and hot-press progression parameters.

Stir-cast progression		Hot-press progression
Input parameters	Levels (1,2,3)	Input parameters	Levels (1,2,3)
A: Stirring speed, rev/min	525, 575,625	E: Temperature, C	420,460,500
B: Stirring time, min	5, 10,15	F: Pressure, MPa	40,80,120
C: Casting temperature, C	700,740,780	G: Dwelling time, min	15,30,45
D: ZrO2 reinforcement, %	4,8,12	–	–