Study On Thermal Deformation Behavior Of 3104 Aluminum Alloy

The data about testing was gotten by isothermal compression testing method with Gleeble-1500 thermal simulator. The deformation behaviors, evolution behaviors of the microstructure and processing maps for the 3104 aluminum alloy have been investigated. The interdependences of flow stressσ, strain rateε? and deformation T for the alloy have been studied with the aids of regression analysis. The restoration mechanisms of the alloy at high temperatures have also been studied with the aids of OM. At last, the processing maps for the alloy have been drawn with the matlab software and have been analyzed in detail. The main contents are as follows:1. A near steady plastic flow of the 3104 aluminum alloy was confirmed during isothermal compression deformation in the range of 300℃～500℃and 0.001-1～1.0-1. The flow stress increases with decreasing of deformation temperature and increasing of strain rate. The stress is sensitive to rate positively.2. There is the process of hot activation under high temperature deformation for 3104 aluminum alloy. The interrelations of flow stress, strain rate and deformation temperature can be described by a hyperbolic sine function for the alloy during the deformation process. That's to say, the flow stress can be described by temperature-compensated strain rate, the so-called Zener-Hollomon parameter.3. With the method of regression analysis the four constants and the flow stress function of 3104 aluminum alloy can be calculated during the deformation process.4. The characteristic of deformation microstructure at high temperatures for 3104 aluminum alloy have been studied. And the critical strain that characterizes the dynamic recrystallization was determined.5. The processing maps for the alloy have been drawn with the matlab software and have been analyzed at details. At last, the region of the best processing property for the alloy has been determined.