Solidification of cast irons

Elliott, R.

doi:10.1016/b978-0-408-01512-7.50006-9

Cited by 26 publications

(49 citation statements)

References 56 publications

(38 reference statements)

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“…The graphite in spheroidal irons occurs as finely dispersed spheroids and in flake irons as interconnected graphite flakes. 6 Figure 4(a) shows an optical micrograph of polished flake iron where the alternating layers of cementite and ferrite of the pearlitic matrix and random orientation of the graphite flakes can be seen. Figure 4(b) shows an optical micrograph of polished spheroidal iron photographed under polarised light.…”

Section: Cast Iron Particulate Compositementioning

confidence: 99%

Investigation of structure/property relationships in particulate composites through the use of Raman spectroscopy

Cooper¹,

Young²

1999

J. Raman Spectrosc.

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Raman spectroscopy has been used to characterise the structure of three very different particulate composite systems: aramid particles in nylon 6.6, cast iron (graphite particles in an iron matrix) and C 60 or carbon nanotubes in an epoxy resin matrix. In addition, Raman spectroscopy has been used to follow the stressinduced tensile deformation of the particles within the composite matrices. It is shown that, for the different composite systems, certain Raman band positions move to lower wavenumber upon the application of a tensile strain and that the rate of this Raman band shift gives an indication of the level of reinforcement from the dispersed particulate phase. In each case stress transfer between the matrix and particles is observed but, in general, it is demonstrated that particulate reinforcement is not as efficient as fibre reinforcement.

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Section: Cast Iron Particulate Compositementioning

confidence: 99%

Investigation of structure/property relationships in particulate composites through the use of Raman spectroscopy

Cooper¹,

Young²

1999

J. Raman Spectrosc.

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“…This theory is well corroborated with the principles of slag thermodynamics and chemistry that suggest higher P removal with CaO than the FeO 38 . It is noteworthy that the P can lead to the formation of liquid phosphides at the grain boundaries and cause cracking during mechanical working such as forging 39 , 40 . Therefore, in order to clarify further that whether CaO was added intentionally during the iron making process to remove P from iron, we have characterized the iron ores, which were used in iron making practice and collected from the same site, using XRD.…”

Section: Resultsmentioning

confidence: 99%

Uncovering the superior corrosion resistance of iron made via ancient Indian iron-making practice

Dwivedi

Mata

Salvemini

et al. 2021

Sci Rep

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Ancient Indian iron artefacts have always fascinated researchers due to their excellent corrosion resistance, but the scientific explanation of this feature remains to be elucidated. We have investigated corrosion resistance of iron manufactured according to traditional metallurgical processes by the Indian tribes called ‘Agaria’. Iron samples were recovered from central India (Aamadandh, Korba district, Chhattisgarh). Iron artefacts are investigated using a range of correlative microscopic, spectroscopic, diffraction and tomographic techniques to postulate the hidden mechanisms of superlative corrosion resistance. The importance of manufacturing steps, ingredients involved in Agaria’s iron making process, and post-metal treatment using metal-working operation called hot hammering (forging) is highlighted. This study also hypothesizes the probable protective mechanisms of corrosion resistance of iron. Findings are expected to have a broad impact across multiple disciplines such as archaeology, metallurgy and materials science.

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“…KGDD'ler çok iyi dökülebilirlik ve sade karbonlu sıcak dövülmüş çeliğin tokluğunu bir araya getirmenin yanı sıra, dökülmüş halde çok iyi çekme dayanımı ve toplam uzama değerlerine sahiptir. [Jenkins ve Forest, 1990;Elliot, 1988;Hughes, 1988;Karsay, 1979].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Normali̇ze Isil İşlemi̇nde Arakri̇ti̇k Östeni̇tleme Sicakliğinin Küresel Grafi̇tli̇ Dökme Demi̇ri̇n Mi̇kroyapi Ve Mekani̇k Özelli̇kleri̇ Üzeri̇ne Etki̇si̇

KAYAALP

Şahin

Kılıçlı

2022

Konya Journal of Engineering Sciences

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In this investigation, the effect of normalizing heat treatments from annealing at intercritical austenitization temperatures on the microstructural evolution and mechanical properties of ductile iron was examined. Tensile specimens were prepared by turning from Y block castings made from unalloyed ductile iron. The specimens were air-cooled from different intercritical austenitization temperatures at (770°C to 820°C) for 60 minutes. Microstructural characterization was performed by optical microscope and scanning electron microscope (SEM). Mechanical properties were determined by tensile and hardness tests. Ductile iron containing different pearlite volume fractions (8 % to 75 %) can be produced by normalizing heat treatment from intercritical austenitization temperatures in ductile iron with a certain chemical composition. The pearlite volume fraction is significantly increased with increasing intercritical austenitization temperatures. Moreover, the hardness, yield, and tensile strength are significantly increased with increasing pearlite volume fraction. However, total elongation and reduction in area decreased with decreasing volume fraction of proeutectoid ferrite. With increasing volume fraction of pearlite from 8 % to 75 %; the hardness increased from 181 BHN to 259 BHN; yield strength increased from 348 MPa to 470 MPa; and the tensile strength significantly increased from 569 MPa to 790 MPa, while the total % elongation decreased from 12.6 % to 8.3 %. The fractographic analysis showed that the number of dimples zones decreased with increasing volume fraction of pearlite.

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Solidification of cast irons

Cited by 26 publications

References 56 publications

Investigation of structure/property relationships in particulate composites through the use of Raman spectroscopy

Investigation of structure/property relationships in particulate composites through the use of Raman spectroscopy

Uncovering the superior corrosion resistance of iron made via ancient Indian iron-making practice

Normali̇ze Isil İşlemi̇nde Arakri̇ti̇k Östeni̇tleme Sicakliğinin Küresel Grafi̇tli̇ Dökme Demi̇ri̇n Mi̇kroyapi Ve Mekani̇k Özelli̇kleri̇ Üzeri̇ne Etki̇si̇

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