Influence of Ultrafine Particles on Structure, Mechanical Properties, and Strengthening of Ductile Cast Iron

Abstract

Integrated assessment of the influence of an ultrafine mixture TiO2 + ZrO2 + Na3AlF6 on the formation of the structure, mechanical properties, and strengthening of ductile cast iron was made in the paper. The structural-phase composition of ductile cast iron was studied by means of scanning electron microscopy and a transmission electron microscope. Plastic deformation was determined during testing of uniaxial compression. The change in the structural state of the alloy and in its mechanical properties was observed. Quantitative assessment of contributions of separate physical mechanisms to strengthening characteristics of unmodified and modified ductile cast iron was made.

Keywords

• ductile cast iron
• modification
• ultrafine powders
• microstructure
• tensile strength
• wear resistance
• yield strength
• strengthening