Abstract
This paper deals with microcutting mechanism of an amorphous metal. Amorphous metal is isotropic and homogeneous, so that it is considered to be a simulation material in order to elucidate essential mechanism of cutting. In cutting of amorphous metal, characteristic chips which exhibit typical lamellar slip structure are formed. The purpose of this paper is to elucidate the mechanism of lamellar slip structure formation from theoretical and experimental points of view. The process of lamellar slip formation in Fe-base amorphous metal cutting is simulated by applying the rigid-plastic FEM (Finite Element Method) with considering adiabatic deformation and local temperature increase. The experiment of chip formation process is done by means of insitu SEM (Scanning Electron Microscope) observation. In the FEM analysis, local slip is generated periodically, and lamellar slip structure is formed. The simulated chip morphology including lamellar slip angle and spacing of lamellar slip and the calculated average value of specific cutting force are in good agreement with the experimental results.
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