Influence of rare earths on shrinkage porosity in thin walled ductile cast iron

Karl Martin Pedersen, Niels Skat Tiedje

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

Ductile cast iron has been cast in test bars with thickness from 2 to 10 mm. The rare earth elements La and Ce have been added to some of the castings to evaluate their influence on microstructure and shrinkage tendency. Both La and Ce increased the graphite nodule count, especially for thickness of 6 mm and below. La gave the best nodule size distribution with many small nodules. La had less shrinkage tendency than Ce in the 10 mm test bars. This tendency was less pronounced for the 6 and 4 mm test bars and other factors may have a large influence at these thicknesses. Increasing the temperature T-1, which is controlled by the growth of off-eutectic austenite dendrites, increased the shrinkage tendency.
Original languageEnglish
JournalInternational Journal of Cast Metals Research
Volume22
Issue number1-4
Pages (from-to)302-305
ISSN1364-0461
DOIs
Publication statusPublished - 2009
EventInternational Conference on Advances in Solidification Process - Graz, AUSTRIA,
Duration: 1 Jan 2008 → …
Conference number: 2nd

Conference

ConferenceInternational Conference on Advances in Solidification Process
Number2nd
CityGraz, AUSTRIA,
Period01/01/2008 → …

Keywords

  • Shrinkage
  • Graphite nodules
  • Cerium
  • Lanthanum
  • Size distribution

Cite this

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title = "Influence of rare earths on shrinkage porosity in thin walled ductile cast iron",
abstract = "Ductile cast iron has been cast in test bars with thickness from 2 to 10 mm. The rare earth elements La and Ce have been added to some of the castings to evaluate their influence on microstructure and shrinkage tendency. Both La and Ce increased the graphite nodule count, especially for thickness of 6 mm and below. La gave the best nodule size distribution with many small nodules. La had less shrinkage tendency than Ce in the 10 mm test bars. This tendency was less pronounced for the 6 and 4 mm test bars and other factors may have a large influence at these thicknesses. Increasing the temperature T-1, which is controlled by the growth of off-eutectic austenite dendrites, increased the shrinkage tendency.",
keywords = "Shrinkage, Graphite nodules, Cerium, Lanthanum, Size distribution",
author = "Pedersen, {Karl Martin} and Tiedje, {Niels Skat}",
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Influence of rare earths on shrinkage porosity in thin walled ductile cast iron. / Pedersen, Karl Martin; Tiedje, Niels Skat.

In: International Journal of Cast Metals Research, Vol. 22, No. 1-4, 2009, p. 302-305.

Research output: Contribution to journalConference articleResearchpeer-review

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AU - Pedersen, Karl Martin

AU - Tiedje, Niels Skat

PY - 2009

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N2 - Ductile cast iron has been cast in test bars with thickness from 2 to 10 mm. The rare earth elements La and Ce have been added to some of the castings to evaluate their influence on microstructure and shrinkage tendency. Both La and Ce increased the graphite nodule count, especially for thickness of 6 mm and below. La gave the best nodule size distribution with many small nodules. La had less shrinkage tendency than Ce in the 10 mm test bars. This tendency was less pronounced for the 6 and 4 mm test bars and other factors may have a large influence at these thicknesses. Increasing the temperature T-1, which is controlled by the growth of off-eutectic austenite dendrites, increased the shrinkage tendency.

AB - Ductile cast iron has been cast in test bars with thickness from 2 to 10 mm. The rare earth elements La and Ce have been added to some of the castings to evaluate their influence on microstructure and shrinkage tendency. Both La and Ce increased the graphite nodule count, especially for thickness of 6 mm and below. La gave the best nodule size distribution with many small nodules. La had less shrinkage tendency than Ce in the 10 mm test bars. This tendency was less pronounced for the 6 and 4 mm test bars and other factors may have a large influence at these thicknesses. Increasing the temperature T-1, which is controlled by the growth of off-eutectic austenite dendrites, increased the shrinkage tendency.

KW - Shrinkage

KW - Graphite nodules

KW - Cerium

KW - Lanthanum

KW - Size distribution

U2 - 10.1179/136404609X367830

DO - 10.1179/136404609X367830

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JO - International Journal of Cast Metals Research

JF - International Journal of Cast Metals Research

SN - 1364-0461

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