Influence of Inoculant Type on the Microstructure Characteristics and Mechanical Properties of Ductile Iron

Mourad, Mohamed; El‐Hadad, Shimaa; Ibrahim, Mervat

doi:10.1007/s12666-020-01929-5

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…[9] To control the matrix structure and eliminate or reduce carbide formation, the inoculation of the ductile iron is done, which may be prior to Mg treatment (preconditioning) or simultaneously with Mg treatment or after the Mg treatment (late inoculation). [10][11][12] Gonzaga [13] demonstrated that ductile iron with a matrix structure 30% of ferrite and 70% of pearlite has the highest fracture toughness, yield strength, and hardness. Bockus and Zaldarys [14] studied the effect of section thickness on graphite parameters of ductile iron and reported that the diameter of the spheroids increases with an increase in section thickness.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Nodularity Value of Graphite in Ductile Iron and Its Effect on Mechanical Properties

Singh

Yadav

Kumar³

2023

Macromolecular Symposia

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Ductile iron is becoming popular in many industrial applications due to its comparatively high strength and a considerable amount of ductility, which is because of the presence of spheroidal graphite in the microstructure. An effort has been made to improve the nodularity value of graphite in ductile iron by varying the fineness of inoculant, that is, ferro-silicon (Fe-Si) and section thickness of the casting. Further, the effects on mechanical properties are also studied. The spheroidal graphite iron specimens for different inoculant treatments, such as without any inoculation, in-mold inoculation with coarse, and fine Fe-Si, are prepared. The results have shown that the nodularity increased with in-mold inoculation with Fe-Si, and for the same amount of inoculated Fe-Si, the nodularity is higher for fine Fe-Si. Ultimate tensile strength is also found to increase with the increase in nodularity, and maximum strength of ≈460 MPa is recorded for a specimen having in-mold inoculation with fine Fe-Si. Stepped bar specimens of different thicknesses are also prepared by casting with the same composition for studying the effect of section thickness, and nodularity value is found to be higher for the thinnest section and is about ≈48%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of Nodularity Value of Graphite in Ductile Iron and Its Effect on Mechanical Properties

Singh

Yadav

Kumar³

2023

Macromolecular Symposia

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Effect of La–O–S complex inoculant on microstructure and mechanical characteristics of ductile iron

Feng

Sun

et al. 2022

J Mater Sci

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Investigation on effect of different types of inoculants on the solidification of ductile cast iron using thermal analysis

Sangame,

Reddy

2024

MMMS

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PurposeProducing superior-quality ductile cast iron demands the use of various intricate inoculants. In addition to iron and silicon, these materials also include alloying elements like calcium, barium, cerium, bismuth and zirconium. These elements are effective in minimizing carbide solidification and enhancing the formation of eutectic cells, thereby resulting in improved cast iron quality.Design/methodology/approachThis article discusses the findings of an investigation on how various inoculants impact critical thermal analysis parameters such as undercooling, recalescence and their correlation with the nucleation of graphite nodules and shrinkage tendency.FindingsFor the study, five distinct inoculants with varying active components in their chemical composition were utilized. The particular formulation of the inoculant has a notable impact on the extent of undercooling during the solidifying process of ductile cast iron. Investigation indicates that incorporating inoculant reduces the temperature at which austenite dendrites form and raises the eutectic freezing temperature. Upon analyzing the microstructure, it is found that the inclusion of inoculation led to a rise in the nodule count from 103 to 272 nodules.Originality/valueAn increased graphite factor, which denotes the growth of graphite nodules during the subsequent stage of the eutectic reaction, supports the benefits of inoculation. Ce and Bi-inoculation have increased the growth of graphite nodules in the cast area during solidification compared to other inoculant formulations. This enhanced production helps in decreasing the size of macroporosity.

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Influence of Inoculant Type on the Microstructure Characteristics and Mechanical Properties of Ductile Iron

Cited by 3 publications

References 13 publications

Improvement of Nodularity Value of Graphite in Ductile Iron and Its Effect on Mechanical Properties

Improvement of Nodularity Value of Graphite in Ductile Iron and Its Effect on Mechanical Properties

Effect of La–O–S complex inoculant on microstructure and mechanical characteristics of ductile iron

Investigation on effect of different types of inoculants on the solidification of ductile cast iron using thermal analysis

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