Experimental Study and Theory Prediction on Adiabatic Shear of Fe-36Ni Invar Alloy

Orthogonal cutting experiments of Fe-36Ni invar alloy are performed to investigate the influence of cutting conditions on adiabatic shear, which occurs in the process of chip formation of many materials. It is found that the cutting speed, cutting depth and rake angle all have influence on adiabatic shear and there is a critical cutting speed at which the adiabatic shear appears. By metallurgical observation, the critical cutting speed under different undeformed chip thicknesses and rake angles are given. A model based on linear pertubation analysis is used to predict the critical ctting conditions of Fe-36Ni invar alloy. The comparisom of prediction results and that of expriments shows that this prediction model is available.