Considering age hardening, the yield strength of an alloy consists of the contributions of lattice resistance, work hardening, grain boundary (Hall-Petch) hardening, solid solution strengthening, and precipitation hardening. A model has been developed to perform the necessary calculations. The input is the PSD calculated by the KWN model. A Matlab code for the calculation of the PSD with the KWN model and the final alloy strength has been developed in the Laboratory of Materials at the University of Thessaly and has been used for the calculation of the aging curve of aluminum alloys under isothermal conditions.

Reference:Serafeim, A. & Haidemenopoulos, G.N. (2012). Development of a kinetic model describing precipitation of second-phase particles during ageing of aluminum alloys, Junior EUROMAT Conference, Lausanne, Switzerland, 2012.