Towards the theoretical/experimental description of the evolution of material properties at frictional interfaces in metal forming processes

Frictional interfaces of fabrication processes induce a drastic change in material properties within thin layer where constitutive equations should be different from those bulk. This paper focuses on determining two relationships for Aluminum 6061 without conventional formulation the friction law. One them connects thickness and integrated strain rate intensity factor, other is hardness at surface factor. Plane extrusion used as testing to provide experimental data. general methodology applies any ductile materials can