Microstructure, indentation and work hardening of Cu/Ag multilayers

International audienceInstrumented indentation and tensile tests were performed on free standing Cu/Ag multilayer thin films with layer thicknesses in the range 0.85-900 nm. The effect of layer thickness can be described by a Hall-Petch relationship. The work hardening rate in the tensile test depends on layer thickness which indicates that the interfaces create storage sites for dislocations and follows an inverse power law