Deformation Analysis And Prediction On Texture Evolution Of 6N01 Aluminum Alloy During Different Hot Extrusion Process Based On Crystal Plasticity Model

At present,with the rapid economical and scientific development,green manufacturing,energy saving and emission reduction have become an important part of the national sustainable development strategy.With the advantages of high strength,good forming property,corrosion resistance and excellent welding performance,aluminium alloy is widely used in automobile,high-speed train,aerospace and other manufacturing fields and it is of great significance to realize the lightweight materials and promote sustainable development.Extrusion is an important method to form the aluminium alloy profile.The strong texture often appears in the extrusion process,which has a great influence on the mechanical properties of aluminium alloy profiles and have become the main factor affecting the microstructure and the rate of finished product of aluminium profiles.Therefore,it is very necessary to study the deformation mechanism,texture evolution of aluminium alloy in the process of hot extrusion and then predict the texture evolution in the process of hot extrusion,which will provide theoretical support for improving the product quality of 6N01 profile.In this study,the AA6N01 aluminium alloy materials are chosen to investigate the deformation and texture evolution during round bar extrusion,helical extrusion process with the help of Electron Backscatter Diffraction(EBSD),Finite element analysis software HyperXtrude,numerical analysis software MATLAB and its toolbox MTEX.The main works of this paper are as follows:(1)With the designed 200T extrusion machine,a series of round bar extrusion experiments are carried under different ram speeds.The helical extrusion experiment was carried out with using the 800T extrusion machine.Based on EBSD mesurement,the microstructure in different positions of profile in these two extrusion processes are studied,clarifying the texture evolution of different positions of profiles in extrusion process.(2)These two different kinds of extrusion processes are simulated by using the Finite Element software HyperXtrude and the deformation histories along selected particle paths which corresponding to different positions on the profile are obtained by particle tracking function.The deformation rate tensor is used to analyze the deformation of different positions in the round bar extrusion process and the deformation tensor is introduced to analyze the deformation mode in the different positions of the helical profile,demonstrating the deformation mode in different positions in the extrusion process.(3)By coupling the FEM simulation and three kinds of crystal plasticity models(FC-Taylor model,Alamel model,Alamel ? model),the texture evolution of different positions of the profile under different extrusion process were predicted,explaining the advantages of the crystal plasticity models in the prediction of texture evolution.