Energy Concept of Hardness by the Kinetic Sphere Indentation

Abstract

Energy hardness is defined as energy density of material’s plastic displacement from the initial surface level. It is convenient to determine it from the kinetic indentation diagram constructed in coordinates P - h, where P is the relative load, h is the relative penetration of a spherical indenter. With that the relative energy density is equal P/h multiplied by the parameter Cp(h) , where varies within a range narrow for the constructional materials. The relative error of the energy hardness determination by this approach does not exceed 5%.