Contribution of texture to the strengthening and fracture in hot-rolled magnesium-12·7 at % cadmium alloy

Abstract

The grain size dependencies of the yield and fracture stresses in hot rolled Mg-12.7 at % Cd alloy have been measured in the temperature range 77 to 420 K and are found to be in accordance with Hall-Petch type of equations. In hot rolled Mg-12.7 Cd alloy, the Hall-Petch intercept σ_oy is higher than that in hot rolled magnesium, while the slope k_y is comparable. The fracture is intercrystalline at 77 K, mixed mode at 300 K and ductile at 420 K. The above flow and fracture behaviours are interpreted in terms of the complimentary effects of texture hardening and solid solution strengthening.