High-Temperature Deformation Behavior and Processing Map of 7050 Aluminum Alloy

The high-temperature deformation behavior and processing map of 7050 aluminum alloy were investigated by tensile tests conducted at various temperatures (340, 380, 420, and 460 degrees C) with various strain rates of 10(-4), 10(-3), 10(-2), and 0.1 s(-1). The results show that the instability region with a peak power dissipation efficiency of 100% occurs at the low deformation temperature region of 340 degrees C to 380 degrees C and high strain rates (>10(-3) s(-1)). The 7050 aluminum alloy exhibited a continuous dynamic recrystallization domain with power dissipation efficiency of 35% to 60% in the deformation temperature range of 410 degrees C to 460 degrees C and the strain rate range of 10(-4)-10(-3) s(-1). The domain with a power dissipation efficiency of 35% to 50% occurring at high deformation temperatures and strain rates was interpreted to represent dynamic recovery. Dynamic recovery and continuous dynamic recrystallization provide chosen domains for excellent hot workability.