UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Synchrotron quantification of graphite nodule evolution during the solidification of cast iron

Azeem, MA; Bjerre, MK; Atwood, RC; Tiedje, N; Lee, PD; (2018) Synchrotron quantification of graphite nodule evolution during the solidification of cast iron. Acta Materialia , 155 pp. 393-401. 10.1016/j.actamat.2018.06.007. (In press). Green open access

[img]
Preview
Text
1-s2.0-S1359645418304737-main.pdf - Published version

Download (2MB) | Preview

Abstract

In cast iron, graphite develops in conjunction with the metallic matrix during solidification. The morphology and distribution of the embedded graphite is pivotal for mechanical properties from yield strength to fatigue. A novel high temperature environmental cell was developed and combined with in situ synchrotron tomography to investigate and quantify microstructural evolution, including graphite nodule nucleation and growth rates in ductile cast iron. The mechanisms of degenerate graphite nodule formation were also revealed. The formation of a coherent primary gamma phase dendritic network before the graphite nucleation is demonstrated. The graphite nodule nucleation rate, mobility and growth rates are compared to classical models, highlighting the limitations in these models. The results provide unique insights to tune the temperature pathways during cast iron solidification to achieve desired uniform rounded graphite morphologies and size distributions.

Type: Article
Title: Synchrotron quantification of graphite nodule evolution during the solidification of cast iron
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.actamat.2018.06.007
Publisher version: http://dx.doi.org/10.1016/j.actamat.2018.06.007
Language: English
Additional information: © 2018 Acta Materialia Inc. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Keywords: Graphite morphology, Cast iron, Synchrotron radiation computed tomography, Nucleation and growth, Growth kinetics
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10051409
Downloads since deposit
72Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item