Non-hardenable materials
Hardness of common metals - Rigid limit case – plastic

To clarify the flow morphology according to indenter geometry and friction, let's first consider the case of indentation by a dihedron: each slice of material in a plane perpendicular to the edge of the dihedron undergoes the same deformation (plane deformation) and we know two simple and possible forms of plastic flow (figure 1) described by the sliding line field method [14]. The deformation zone is located in the immediate vicinity of the indentor: here, the material is driven by a velocity of constant modulus and direction...