The effects of dynamic evolution of microstructure on machining forces

A material microstructure-mechanics-affected machining scheme is proposed to account for the influence of material microstructural evolution on cutting mechanics. Explicit calculation of material microstructural evolution path is provided. To blend the material microstructure states into the thermo-mechanical coupling process, the material microstructure terms are introduced into the traditional Johnson-Cook model. As an application, the machining forces and average grain size are predicted in the orthogonal turning of titanium alloys. This method provides a more comprehensive way to explore microstructure-thermo-mechanical coupling in the machining process.