Hall-Petch 1951: yield strength sigma_y = sigma_0 + k_y / sqrt(d), where d is grain size; nano-grain materials achieve very high strength but show inverse Hall-Petch breakdown below ~10 nm.
Hall-Petch 1951: yield strength sigma_y = sigma_0 + k_y / sqrt(d), where d is grain size; nano-grain materials achieve very high strength but show inverse Hall-Petch breakdown below ~10 nm.