Solidification of Hypereutectic Thin Wall Ductile Cast Iron

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2006

Standard

Solidification of Hypereutectic Thin Wall Ductile Cast Iron. / Pedersen, Karl Martin; Tiedje, Niels Skat.

Solidification and Gravity IV Material Science Forum. Vol. 508 Zurich-uetikon : Trans Tech Publications Ltd, 2006. p. 63-68 (Materials Science Forum, Vol. 508).

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2006

Harvard

Pedersen, KM & Tiedje, NS 2006, 'Solidification of Hypereutectic Thin Wall Ductile Cast Iron'. in Solidification and Gravity IV Material Science Forum. vol. 508, Trans Tech Publications Ltd, Zurich-uetikon, pp. 63-68. Materials Science Forum, vol. 508

APA

Pedersen, K. M., & Tiedje, N. S. (2006). Solidification of Hypereutectic Thin Wall Ductile Cast Iron. In Solidification and Gravity IV Material Science Forum. (Vol. 508, pp. 63-68). Zurich-uetikon: Trans Tech Publications Ltd. (Materials Science Forum, Vol. 508).

CBE

Pedersen KM, Tiedje NS. 2006. Solidification of Hypereutectic Thin Wall Ductile Cast Iron. In Solidification and Gravity IV Material Science Forum. Zurich-uetikon: Trans Tech Publications Ltd. pp. 63-68. (Materials Science Forum, Vol. 508).

MLA

Pedersen, Karl Martin and Niels Skat Tiedje "Solidification of Hypereutectic Thin Wall Ductile Cast Iron". Solidification and Gravity IV Material Science Forum. Zurich-uetikon: Trans Tech Publications Ltd. 2006. 63-68. (Materials Science Forum, Volume 508).

Vancouver

Pedersen KM, Tiedje NS. Solidification of Hypereutectic Thin Wall Ductile Cast Iron. In Solidification and Gravity IV Material Science Forum. Vol. 508. Zurich-uetikon: Trans Tech Publications Ltd. 2006. p. 63-68. (Materials Science Forum, Vol. 508).

Author

Pedersen, Karl Martin; Tiedje, Niels Skat / Solidification of Hypereutectic Thin Wall Ductile Cast Iron.

Solidification and Gravity IV Material Science Forum. Vol. 508 Zurich-uetikon : Trans Tech Publications Ltd, 2006. p. 63-68 (Materials Science Forum, Vol. 508).

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2006

Bibtex

@inbook{15033969762441c49c8cb6f120763cc5,
title = "Solidification of Hypereutectic Thin Wall Ductile Cast Iron",
keywords = "nucleation, thin wall, kinetic, microstructure, ductile cast iron, solidification",
publisher = "Trans Tech Publications Ltd",
author = "Pedersen, {Karl Martin} and Tiedje, {Niels Skat}",
year = "2006",
volume = "508",
series = "Materials Science Forum",
pages = "63-68",
booktitle = "Solidification and Gravity IV Material Science Forum",

}

RIS

TY - GEN

T1 - Solidification of Hypereutectic Thin Wall Ductile Cast Iron

A1 - Pedersen,Karl Martin

A1 - Tiedje,Niels Skat

AU - Pedersen,Karl Martin

AU - Tiedje,Niels Skat

PB - Trans Tech Publications Ltd

CY - Zurich-uetikon

PY - 2006

Y1 - 2006

N2 - Hypereutectic ductile iron was cast in green sand moulds with four plates with thickness of 1.5, 2, 3 and 4 mm in each mould. Temperatures were measured in the 3 and 4 mm plate. The temperature curves showed that eutectic solidification was divided into two stages: primary and secondary eutectic solidification. The first stage, which was relatively short, had none or very little recalescence. Further under cooling, followed by reheating during recalescence, was necessary to initiate the second part of the eutectic solidification. Both the secondary under cooling and recalescence was larger in the 3 mm plates than in the 4 mm plates. All 1.5 mm plates contained carbides but the other plates solidified without carbides. Metallographic examination showed two populations of graphite nodules. A small group of nodules was larger than rest of the nodules. Color etching revealing the segregation of Si showed a higher Si content in the ferrite around the larger nodules compared to the ferrite around the rest of the nodules. This indicates that solidification took place along the following path: The solidification starts with nucleation and growth of primary graphite nodules. This probably starts during the filling of the mould. The primary nodules act as nuclei for austenite. As austenite easily nucleates on graphite the temperature will be the same for the 3 and 4 mm plate for the first part of the eutectic solidification. This first part of the solidification ends when concentration of carbon around austenite dendrites is too large and new nodules have to nucleate and grow. The larger under cooling for the 3 mm plates compared to the 4 mm indicates that the nucleation of new nodules is governed by kinetics even in very well inoculated melts.

AB - Hypereutectic ductile iron was cast in green sand moulds with four plates with thickness of 1.5, 2, 3 and 4 mm in each mould. Temperatures were measured in the 3 and 4 mm plate. The temperature curves showed that eutectic solidification was divided into two stages: primary and secondary eutectic solidification. The first stage, which was relatively short, had none or very little recalescence. Further under cooling, followed by reheating during recalescence, was necessary to initiate the second part of the eutectic solidification. Both the secondary under cooling and recalescence was larger in the 3 mm plates than in the 4 mm plates. All 1.5 mm plates contained carbides but the other plates solidified without carbides. Metallographic examination showed two populations of graphite nodules. A small group of nodules was larger than rest of the nodules. Color etching revealing the segregation of Si showed a higher Si content in the ferrite around the larger nodules compared to the ferrite around the rest of the nodules. This indicates that solidification took place along the following path: The solidification starts with nucleation and growth of primary graphite nodules. This probably starts during the filling of the mould. The primary nodules act as nuclei for austenite. As austenite easily nucleates on graphite the temperature will be the same for the 3 and 4 mm plate for the first part of the eutectic solidification. This first part of the solidification ends when concentration of carbon around austenite dendrites is too large and new nodules have to nucleate and grow. The larger under cooling for the 3 mm plates compared to the 4 mm indicates that the nucleation of new nodules is governed by kinetics even in very well inoculated melts.

KW - nucleation

KW - thin wall

KW - kinetic

KW - microstructure

KW - ductile cast iron

KW - solidification

UR - http://www.ipl.dtu.dk/publikation/8373/dk/

VL - 508

BT - Solidification and Gravity IV Material Science Forum

T2 - Solidification and Gravity IV Material Science Forum

T3 - Materials Science Forum

T3 - en_GB

SP - 63

EP - 68

ER -