Plastic Deformation Behavior of 5A02 Aluminum Alloy Sheet at High Temperature

Taking 5A02 aluminum alloy cold-rolled sheet as the research object, the plastic deformation behavior of 5A02 aluminum alloy at different temperatures and strain rates was analyzed through uniaxial tensile test and metallographic test. Through combining experimental data and Zener-Hollomon parameter model, the constitutive model of 5A02 aluminum alloy under high temperature conditions was studied. The results show that the strain rate and deformation temperature have a great influence on the elongation when the 5A02 aluminum alloy is deformed under high temperature conditions. At strain rates of 0.01, 0.001, 0.0005 and 0.0001 s(-1), the elongation of 5A02 aluminum alloy is greater than 100% when the deformation temperature is above 250 degrees C. The true stress-strain curve of 5A02 aluminum alloy is characterized by dynamic recovery when the deformation temperature is 150-250 degrees C, and the flow stress curve has obvious softening phenomenon when the deformation temperature is above 250 degrees C.