Plastic Instability of the C35 Steel under Mechanical Surface Treatment Effect

Burnishing is a mechanical surface treatment (MST) that implements a plastic deformation of the surface layers of materials and modifies their basic properties. A comparative study between the tensile properties resulting from machining and burnishing states was conducted. By modeling the stress-strain curves, the work hardening coefficient of the material was evaluated to better appreciate the field of plastic instability for both conditions. A simulation of the tensile test performed by the Abaqus software was used to visualize the phenomenon of plastic instability between the onset of necking and the fracture. The simulation results are in good correlation with those of experiment.