Modeling of the solid state deposition of aluminium alloys employing friction surface cladding
By Ton Bor (University of Twente), Bert Geijselaers (University of Twente), Remko Akkerman (University of Twente)

The Friction Surface Cladding (FSC) process critically depends on the generation of friction and heat during deposition of thin layers as part of cladding and/or additive manufacturing processes. A thorough understanding of the relations between the process parameters, the heat generated per unit of time and the normal force exerted on the substrate is required to further optimise the deposition process.
A new isothermal axisymmetric model has been developed that provides in closed form the flow fields and pressure distribution in between the rotating tool and the substrate during the deposition process. The degrees of stick/slip at the tool/layer and layer/substrate interfaces are pressure dependent through the incorporation of interface dependent friction coefficients.
First results confirm that slip occurs at the tool periphery and full sticking occurs near the central tool opening. Matching model and experimental values of heat generation and normal force allow for determination of both friction coefficients.