Plasticity and Formability Controlling of Cast Iron Using Thermo-Mechanical Treatment

Abstract

There are different methods to improve the mechanical properties of materials such as, heat treatment, casting of alloying element etc. Thermo-Mechanical Treatment at different level of deformation is carried out to enhance the mechanical behavior of ductile cast iron. The tensile properties of the tested iron are determined at room temperature, 450C, 750C, and 850C. However, the effect of testing temperature on ultimate tensile strength, strain hardening coefficient and ductility are investigated at different deformation speed; 1 mm/s, 5 mm/s and 25 mm/s. the results show that temperature affects significantly the deformation properties of the cast iron, the absorbed energy of the materials increases with the increase of deformation temperature and loading speed. The maximum softening is obtained for deformation temperature 850C and smaller strain hardening coefficient 0.27. The deformation parameters temperature and speed make the deformation and flow behavior of this case of cast iron becomes like flow behavior of ductile steel.