Mechanical properties of nanocrystalline materials

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On Strain Hardening Mechanism in Gradient Nanostructures (2021, background): “…renders metals ultra-high strength but low ductility (Beyerlein et al., 2015; Farrokh and Khan, 2009; Gleiter,1989; Khan et al., 2000; Khan and Liu, 2016; Li et al., 2014; Meyers et al., 2006; Ovid'ko, 2002; Rodríguez-Gal (cid:1) an et al., 2015; Rupert, 2016; Weng, 2011; Zhu and Li, 2010).”
Ultra-strength materials (2010, background): “, ductility, is low compared to the coarse-grained materials [131,368].”
Evaluating mechanical properties and crack resistance of CrN, CrTiN, CrAlN and CrTiAlN coatings by nanoindentation and scratch tests (2016, background): “On the other hand, according to reference [58], the necessary condition to avoid film cracking is of a little bit higher modulus ratio (Ec/Es ≥ 1.”
Compressive and wear resistance of nanometric alumina reinforced copper matrix composites (2012, background): “devices, by forming the nano-size composites with some oxides such as Al2O3 [7–9].”