Ductile Regime Machining of Metal Matrix Composites

摘要: This paper presents research results on ultraprecision machining of metal matrix composites (MMCs) reinforced with either SiC or Al2O3 particles. Ductile-regime both and aluminum was applied to improve the surface integrity composite. Both polycrystalline diamond (PCD) single crystalline (SCD) tools were used machine at depth cut ranging from nearly 0 1.0 µm. A SCD tool removed MMC as chips while a PCD simply smeared surface. The critical depths found be 1 µm 0.2 for MMCs SiC, respectively. crystallographic direction ceramic particle sufficient conditions ductile-regime machining. Because random orientation reinforcing particles, some fractured due cutting action others machined in ductile mode same cut. measured finish, therefore, varied significantly depending areas.