X-ray imaging of formation and growth of spheroidal graphite in ductile cast Iron

H. Yasuda, A. Sugiyama, C. Kiattisaksri, K. Morishita, T. Nagira, M. Yoshiya, K. Uesugi, A. Takeuch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Time-resolved and in-situ observations using synchrotron radiation X-rays were performed to observe solidification of cast iron (CE=4.5, 0.02mass%Mg). Morphology of graphite particles was influenced by specimen holder material. In the Al2O3 holder, graphite particles were spheroidal at the beginning and then deviated from the spheroidal shape. In addition, the coupled eutectic solidification of austenite and graphite occurred at the final stage. In contrast, the divorced eutectic solidification, in which graphite particles and austenite dendrites independently grew, was selected until the end of solidification in MgO holder. Spheroidal graphite particles were engulfed by austenite. Consequently, typical microstructure observed in ductile cast iron was reproduced in the in-situ observation. The results suggested that oxygen potential, which was determined by Al2O3 or MgO (specimen holder) in the observations, could be an important factor for the selection of eutectic growth mode and graphite morphology.

Original languageEnglish
Title of host publicationScience and Processing of Cast Iron XI
EditorsAttila Dioszegi, Vasile Lucian Diaconu, Anders E.W. Jarfors
PublisherTrans Tech Publications Ltd
Pages104-109
Number of pages6
ISBN (Print)9783035710557
DOIs
Publication statusPublished - Jan 1 2018
Externally publishedYes
Event11th International Symposium on the Science and Processing of Cast Iron, SPCI-XI 2017 - Jonkoping, Sweden
Duration: Sep 4 2017Sep 7 2017

Publication series

NameMaterials Science Forum
Volume925 MSF
ISSN (Print)0255-5476

Other

Other11th International Symposium on the Science and Processing of Cast Iron, SPCI-XI 2017
CountrySweden
CityJonkoping
Period9/4/179/7/17

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Yasuda, H., Sugiyama, A., Kiattisaksri, C., Morishita, K., Nagira, T., Yoshiya, M., ... Takeuch, A. (2018). X-ray imaging of formation and growth of spheroidal graphite in ductile cast Iron. In A. Dioszegi, V. L. Diaconu, & A. E. W. Jarfors (Eds.), Science and Processing of Cast Iron XI (pp. 104-109). (Materials Science Forum; Vol. 925 MSF). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.925.104