Use of high intensity X-ray analysis as tool to create new, fundamental models for phase transformations and residual stress in ductile cast iron

N. S. Tiedje*, M. K. Bjerre, T. Andriollo, M. Azeem, Y. Zhang, S. Fæster, P. D. Lee, J. H. Hattel

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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    Cast irons have been used for engineering purposes for thousands of years, and still, today they are essential our society. Their mechanical properties are primarily determined by the shape, size and distribution of graphite in the steel matrix. [1]
    The mechanisms behind graphite growth and development of shape and their coupling to raw material quality and process conditions remain unknown.[2] Also the mechanisms leading to the formation of residual stresses are also not fully clear.[3;4]
    Extensive experimental data has been produced and utilized to generate empirical correlations via statistical methods, showing that e.g. the shape and distribution of graphite affect ductility, yield strength and fatigue properties while carbides influence strength and wear properties.[1] However, little is known on why such correlations hold true, as the individual mechanisms which control the material behavior at the micro-scale have not been clarified.
    Recent advances in high resolution X-Ray methods that involve use of synchrotron facilities have made it possible to do high resolution, in-situ experimental studies of phase transformations in engineering materials thus providing detailed and accurate information on the processes that take place during such phase transformations.[5;6]
    This paper describes how such facilities can be applied to study solidification of cast iron and formation of residual stress after eutectoid transformation by resolving the processes in 3D and time.
    Original languageEnglish
    Title of host publication73rd World Foundry Congress (WFC 2018) Creative Foundry : Proceedings of a meeting held 23-27 September 2018, Krakow, Poland. Young Researchers' Seminar
    PublisherWorld Foundry Organization
    Publication date2018
    ISBN (Print)9781510880429
    Publication statusPublished - 2018
    Event73rd World Foundry Congress (WFC 2018) - Krakow, Poland
    Duration: 23 Sept 201827 Sept 2018


    Conference73rd World Foundry Congress (WFC 2018)


    • Ductile Cast Iron
    • Modelling
    • Microstructure
    • X-Ray Tomography
    • Solidification
    • Residual Stress


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