Effect of homogenisation treatment on segregation of silicon in ferritic ductile irons: A colour metallographic study

C. F. Yeung, H. Zhao, Wing Bun Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


Microsegregation strongly affects the properties of ferritic ductile irons. A homogenisation treatment was attempted to decrease such segregation. The severity of segregation can be determined with microprobe analysis, but this technique cannot reveal the morphology of segregation on a larger scale. The present investigation was undertaken to explore the use of colour metallography for revealing the severity of segregation both qualitatively and quantitatively during the homogenisation treatment. The modification of the morphology of segregation of silicon during homogenisation treatment for different times was revealed clearly by colour metallographic techniques. The proportion of interdendritic areas to the total matrix area was quantified. A semi-quantitative relationship between the difference in the sequence of colour and the degree of segregation of silicon inferritic ductile iron was developed with the use of a combination of a colour metallographic technique and microprobe analysis.
Original languageEnglish
Pages (from-to)733-737
Number of pages5
JournalMaterials Science and Technology
Issue number7
Publication statusPublished - 1 Jan 1999

ASJC Scopus subject areas

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

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