Simulation and experimental study on grinding force and subsurface deformation of FeCoCrNi high entropy alloy

High entropy alloy attracts widespread attention due to its excellent mechanical properties. It becomes a new type of alloy material with high application potential, but the grinding performance of High entropy alloy receives little attention. This paper conducts grinding simulation and surface grinding experiments on FeCoCrNi high entropy and alloys to analyze the grinding removal mechanism of the FeCoCrNi-based High entropy alloy. We also discuss the influence of grinding parameters, element types, element content and forming methods on grinding force and sub-surface plastic deformation after grinding. The simulation and experimental results show that as the increase of grinding depth, both tangential grinding force and normal grinding force increase, and the thickness of sub-surface plastic deformation layer decreases. With the increase of grinding speed, both tangential grinding force and normal grinding force decrease, and the thickness of sub-surface plastic deformation layer caused by grinding process shows a trend of gradual decrease. Under the same processing parameters, the normal grinding force is greater than the tangential grinding force. In FeCoCrNi series high entropy alloys, the grinding force and subsurface plastic deformation layer thickness of high entropy alloys increased with the addition in Ti content. The grinding force and plastic deformation formed by adding Ti element are greater than those formed by adding Al element, and High entropy alloys prepared using laser cladding method exhibit greater grinding force and plastic deformation than those prepared using selective laser melting method. The research results provide theoretical reference and experimental basis for high-quality grinding of high entropy alloys, which may be helpful for the design and manufacturing of high entropy alloy parts.