Influence of specimen dimensions on the tensile behavior of ultrafine-grained Cu

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Review on superior strength and enhanced ductility of metallic nanomaterials (2018, background): “It should be noted that due to small sample size, the elongation to failure presented in this figure and others reported in the literature may be significantly over-estimated [31,32].”
Nanostructural hierarchy increases the strength of aluminium alloys. (2010, unknown): “The use of miniature specimens has been previously investigated in detail; our studies indicate that, although the strain measurement method and tensile specimen geometry can affect the results, when the strain is accurately measured, the specimen size and geometry only affect the postnecking elonga”
In-situ SEM observation of phase transformation and twinning mechanisms in an interstitial high-entropy alloy (2018, methodology): “However, since we used a relatively small tensile sample for the in-situ ECCI probing, compared to the macroscopic tensile testing, the influence of sample dimension and geometry on the results should also be considered [49,50].”
Ductility and Plasticity of Nanostructured Metals: Differences and Issues (2018, background): “It has been found that the sample size and geometry have significant effect on the stressestrain curves and hence the measured ductility [19,20].”