Size effects affected uniaxial tensile properties and formability in rubber pad microforming process of pure nickel thin sheets

The size effects on plastic deformation behaviors of metal thin sheets have a profound impact on the development of microforming process. In this study, the deformation and forming behaviors of pure nickel thin sheets with t/d < 2 (thickness t /average grain size d) were demonstrated by micro tensile tests and rubber pad forming tests. The flow stress decreased evidently and the relationship between true stress and d−0.5 deviated from the...