This study investigates how the forming force and mechanical property of specimen are influenced by equal channel angular extrusion(ECAE) that applied with the different ultrasonic ways. To complete the research, the reference are taken from Christopher[30] and Simakawa Masanori[31] in order to design the lateral ultrasonic system; moreover, the finite element method have also been used in the design. This study present the design of ultrasonic system applies in axial direction, lateral direction, and the combination of both directions. As when different ultrasonic directions are added via ECAE, the changes of forming force、hardness、and surface roughness of specimen will also be discussed below. However, the result shows that ultrasonic assists on ECAE obtain a great improvement on forming force、hardness、surface roughness.
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