Sample Dimensions Influence Strength and Crystal Plasticity

By Michael D. Uchic, D. Dimiduk, J. Florando, W. Nix. Science, 2004

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A review of experimental approaches to fracture toughness evaluation at the micro-scale (2019, background): “Macroscopic yield and flow stress values are generally remarkably lower than micro- and nano-scale compression or tensile testing data [87,111].”
Dislocation escape-related size effects in single-crystal micropillars under uniaxial compression (2007, background): “The extremely low hardening was also exhibited in the testing of single-crystal micropillars [10].”
Effects of initial orientation, sample geometry and friction on anisotropy and crystallographic orientation changes in single crystal microcompression deformation: A crystal plasticity finite element study (2007, methodology): “[1], and proposed that a dislocation starvation effect could have been responsible for this.”
Transition from a strong-yet-brittle to a stronger-and-ductile state by size reduction of metallic glasses. (2010, background): “However, homogeneous flow here is different from hightemperature plasticity in that (1) it shows work hardening to∼25% true strain before fracture, and (2) fracture occurs by shear failure as opposed to drawing-to-a-point.”