Development of cutting technology based on evaluation of cutting behavior with ultra-fine grained materials for fabrication of micro component parts

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ECAP (Equal Channel Angular Pressing) is one of the severe plastic deformation processes for obtaining ultra-fine grained materials. This study investigated the cutting behaviors by the orthogonal cutting for the materials deformed by ECAP.On the conformable conditions between the shear angle on cutting and the angle of shear deformation zone introduced by ECAP, the cutting resistance was decreased. In the other cutting conditions on other the cutting directions and cutting surfaces, a general cutting behavior was confirmed. The anisotropy on cutting was not able to be confirmed for the materials deformed by ECAP with the decreasing an influence of anisotropic. To examine the reason why the cutting resistance decreases, FEM analysis was also carried out. But the reason was not able to be clarified. However, it was able to be judged that there was no big problem in cutting process when the micro parts are made from the material deformed by ECAP.