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Revisiting models for spheroidal graphite growth

DOI: 10.4028/ DOI Help

Authors: Mathias K. Bjerre (Technical University of Denmark) , Mohammed Azeem (The University of Manchester) , Peter D. Lee (The University of Manchester) , Jesper Henri Hattel (Technical University of Denmark) , Niels S. Tiedje (Technical University of Denmark)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Materials Science Forum , VOL 925 , PAGES 118 - 124

State: Published (Approved)
Published: June 2018
Diamond Proposal Number(s): 12204

Open Access Open Access

Abstract: Recent experiments resolved nucleation and growth of graphite during solidification of ductile cast iron in 4D using synchrotron X-ray tomography. A numerical model for microstructure formation during solidification is compared with the experiments. Despite very good overall agreement between observations of spheroidal graphite growth and model results, significant deviations exist towards the end of solidification. We use the experimental observations to analyse the relation between graphite growth rate and the state of the particle neighbourhood to pinpoint possible links between growth rate of individual graphite spheres and the overall solidification state. With this insight we revisit existing models for growth of spheroidal graphite and discuss possible modifications in order to correctly describe the critical final stage of solidification.

Journal Keywords: Cast Iron; Ductile Iron; Graphite; Modelling; X-Ray Tomography

Diamond Keywords: Alloys

Subject Areas: Materials, Engineering

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Added On: 28/06/2018 08:30


Discipline Tags:

Materials Engineering & Processes Materials Science Engineering & Technology Metallurgy

Technical Tags:

Imaging Tomography