Abstract
Abstract The crack propagation and wear evolution of Sialon ceramic tool in cutting Ni-based super-alloy Inconel 718 was researched by the discrete element method(DEM) simulation and experiments. The periodic boundary and three body abrasion methods were introduced, and then a thermal-mechanical coupled model was established to describe the tool-chip tribology behavior. The isolated particles and broken parallel bonds were adopted to evaluate the crack of ceramic tool, and the length and height of spalling were used to estimate the degree of wear. Subsequently, experiments were designed by parameters. The results showed that the DEM model valid reveal the crack propagation process. In addition, process optimization was put forward to ensure comprehensive efficiency in the actual machining course.
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