Mechanical properties of crystalline-amorphous composites: generalisation of Hall-Petch and inverse Hall-Petch behaviours

Zhibin Xu, Mengmeng Li, Yilong Han

The strength, ${\sigma }_{\mathrm{y}}$, of a polycrystal decreases with mean grain diameter $D$ at $D\gtrsim 50$ atoms (i.e. Hall-Petch behaviour) and increases at $D\lesssim 50$ (i.e. inverse Ha…