The mechanical properties of ductile iron at intermediate temperatures:the effect of silicon content and pearlite fraction

Abstract The usage of ductile irons at thermo mechanically loaded components is increasing, necessitating more knowledge of material properties in elevated temperatures. A study of elevated temperature mechanical properties was done, investigating the effect of different pearlite fractions along with silicon content tests in fully ferritic microstructure. Effect of pearlite fraction and silicon content to tensile and yield strength were measured in different temperatures from room temperature up to 450°C. Models were developed, based on those measurements. These resulting regression models were tested with data gathered from literature. These can be used in various design tools, such as FEM calculations and in the optimisation of thermally and cyclic loaded ductile iron components