Review ductile iron: fifty years of continuous development

Labrecque, C.

doi:10.1016/s0008-4433(98)00031-7

Cited by 73 publications

(63 citation statements)

References 15 publications

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“…(4). Based on the tempered graphite particles in malleable cast iron Saltykov has found the relation, which is in good agreement with the previous equations [16]:…”

Section: Introductionsupporting

confidence: 85%

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Graphite nodule count and size distribution in thin-walled ductile cast iron

Pedersen

Tiedje

2008

Materials Characterization

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“…(4). Based on the tempered graphite particles in malleable cast iron Saltykov has found the relation, which is in good agreement with the previous equations [16]:…”

Section: Introductionsupporting

confidence: 85%

“…The nodule count and nodule diameter will also have an influence on fatigue strength [3,4] The graphite nodule count is therefore an important parameter in the characterisation of the microstructure of ductile cast iron.…”

Section: Introductionmentioning

confidence: 99%

Graphite nodule count and size distribution in thin-walled ductile cast iron

Pedersen

Tiedje

2008

Materials Characterization

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“…Ductile iron represents today a modern engineering material offering a unique combination of castability, high ductility and strength at lower prices compared to traditional low carbon steels [1] [2]. Its high technological importance is confirmed by recent market growth analyses [3], indicating that as many as 25 % of the castings currently produced worldwide are made of ductile iron.…”

Section: Introductionmentioning

confidence: 99%

A micro-mechanical analysis of thermo-elastic properties and local residual stresses in ductile iron based on a new anisotropic model for the graphite nodules

Andriollo¹,

Thorborg²,

Tiedje³

et al. 2016

Modelling Simul. Mater. Sci. Eng.

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In this paper, the thermo-elastic behavior of the graphite nodules contained in ductile iron is derived on the basis of recent transmission electron microscopy investigations of their real internal structure. The proposed model is initially validated by performing a finite element homogenization analysis to verify its consistency with the room-temperature elastic properties of ductile iron measured at the macro scale. Subsequently, it is used to investigate the formation of local residual stresses around the graphite particles by simulating the manufacturing process of a typical ferritic ductile iron grade, and the results are compared with preliminary measurements using synchrotron X-rays. Finally, the obtained accurate description of the stress & strain field at the micro scale is used to shed light on common failure modes reported for the nodules and on some peculiar properties observed in ductile iron at both micro and macro scale.

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“…The graphite morphology in SGI and CGI is influenced by a large number of factors during solidification [16][17][18][19][20][21][22]. Depending on the liquid composition, solidification starts with either primary precipitation followed by eutectic formation, or directly with an eutectic formation.…”

Section: Solidification Pathmentioning

confidence: 99%

General Characteristic of the Ductile and Compacted Graphite Cast Iron

Górny

2015

Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings

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This section provides basic information about the spheroidal graphite cast iron (SGI) and compacted graphite cast iron (CGI) which belong to the group of high-quality cast iron. The classification of SGI and CGI according to ISO standards, their characteristics and the use of modern types such as ADI or Si-Mo were provided. The solidification path was shown, pointing to the important role of surface active elements in shaping the form of graphite. Models presenting eutectic grain growth in SGI and CGI were also described. It was also shown that in this connection, the main surface active elements (O and S) cause changes in the growth direction, and additionally, the so-called anti-spheroidizers, such as Ti, Bi, Zr, P and N, characterized by strong normal segregation, lower the liquidus temperature of the melt, thus creating the liquid channels that characterize CGI, which then stimulate the formation of compacted graphite. The issues of the number of eutectic grains, the cooling rate and the occurrence of defects in castings were raised. Finally the spheroidizing/compacting treatments have been shown along with the general scheme of the SGI/CGI preparation process.Spheroidal graphite cast iron (SGI) and compacted graphite cast iron (CGI) belong to the group of high-quality cast iron, the production of which is continually increasing. The general classification of cast iron is shown in Fig. 6.1.Currently, SGI and CGI, belongs to a group of the most important engineering materials, in view of its:• high mechanical properties, • significant savings in cost and weight (compared to equivalent steel and aluminum alloys), • excellent combination of good castability and machinability, • less sensitive to the cooling rate compared to cast iron (FGI), • provides the starting material for the production of "high tech" austempered ductile iron (ADI) and austempered vermicular cast iron (AVCI),

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Review ductile iron: fifty years of continuous development

Cited by 73 publications

References 15 publications

Graphite nodule count and size distribution in thin-walled ductile cast iron

Graphite nodule count and size distribution in thin-walled ductile cast iron

A micro-mechanical analysis of thermo-elastic properties and local residual stresses in ductile iron based on a new anisotropic model for the graphite nodules

General Characteristic of the Ductile and Compacted Graphite Cast Iron

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