This paper investigates the axial ultrasonic vibration assisted multi-pass equal channel angular extrusion by experiment and FEM simulation. Experimentally change three different route (Route A, Route B and Route C) and ultrasonic applied or not to investigate the forming load, billet's hardness and surface roughness. Experiment results show that application of ultrasonic vibration can make reduction of forming load of multi-pass ECAE processes. While in the condition of route B and route C, ultrasonic vibration make billet's hardness distribution more uniformly. Furthermore, using FEM software Deform-3D to simulated load-stroke curve and load were also compared with the experimentally recorded load-stroke curve and load. Simulation results show that good conformity is observed between the FEM simulation and experimental results.
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