Effects of Crystallographic Anistropy on Orthogonal Micromachining of Single-Crystal Aluminum

摘要: Anisotropy of workpiece crystals has a significant effect in micromachining since the uncut chip thickness values used are commensurate with characteristic dimensions crystalline materials. This paper presents an experimental investigation on orthogonal single-crystal aluminum at different crystallographic orientations for varying thicknesses and cutting speeds using diamond tool. Micromachining forces, specific energies, effective coefficient friction, shear angles, stresses, morphology were examined six ranging from 5 μm to 20 mm/s 15 mm/s. Three distinct types forces observed, including steady (Type-I), bistable (Type-II), fluctuating (Type-III) force signatures. The seen vary by as much threefold orientation. Although speed was small, have orientation-dependent average forces. Chip morphology, analyzed under scanning electron microscopy, showed shear-front lamella, periodicity which thicknesses.