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.

A Review on the Prospect for the Development of Nanostructured and Nanocomposite Aluminium-Alloyed Austempered Ductile Iron

“…One of the most efficient method is to modify using modifiers at ultra-fine or nanoscale level as additive to the melt prior casting. There is continuous quest for innovative approaches of upgrading the structural and mechanical characteristics of ductile irons, including the process of introducing the modifiers (Zykova et al, 2018;Ferro et al, 2013;Cho et al, 2007;Slozoy et al, 2015;Shen et al, 1995). The technological advancement in nanocomposite development has equally provided further advantages in its realisation.…”

“…The studies carried out by Zykova et al (2018) assessed the impact of TiO2 + ZrO2 + Na3AlF6 mixture in an ultrafine form on the structural mechanism and features; strengthening effect and mechanical properties of ductile iron. In the research, the impact of the modifying mixtures of TiO2, ZrO2 and Na3AlF6 used in ultrafine particles of 0.07 μm to 14 μm with average of ~0.93 μm on the microstructure and mechanical properties of ductile iron was analysed.…”

Effect of Solidification Time on Microstructural, Mechanical and Fatigue Properties of Solution Strengthened Ferritic Ductile Iron

“…Compared to other methods used in literature [31], it is important to highlight the fact that, through the solid solution strengthening made by Silicon, it is possible to reach both high strength and ductility. In particular, the ultimate tensile strength is similar to the value of traditional GJS 500-7, while the elongation at failure is close to that of GJS 400-18 cast iron [1].…”