Authors: T.B. Tengen
Affilation: Vaal University of Technology, South Africa
Pages: 661 - 664
Keywords: features on grains, grain shape, grain size, mechanical properties
Recent findings report that both mean grain size and dispersion should be used to design nanomaterials with desired mechanical properties. Grain size deals with “equivalent radius” that assumes that grains are spherical. But two grains of the same size might be different shape- wise, and hence, may impart different mechanical effects on neighbouring grains. Consequently some nanomaterials having same mean grain size and same dispersion have different properties. This paper proposes an approach to predict or design nanomaterials mechanical properties from observed features on their grains. Grain growth effect the change from one state to another. The model is tested with data from nano-Aluminium. Relationships between statistics of microscope-observed (cumulative) number of faces on grains, density of grains in nanomaterials and mechanical properties are “similar” to Hall-Petch-to-Reverse-Petch relations. Further refinement with grain density constant may lead to no/retarded RHPR.
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