Interdendritic microsegregation development of high-strength low-alloy steels during continuous casting process

Dayue Zhang, Martin Strangwood

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A 1-D model based on DICTRA software was used to simulate Mn microsegregation in highstrength low-alloy steels during continuous casting. The experimentally determined (using a cumulative profiling method) segregation results were in good agreement with the modelling results. Steels undergoing solidification via a peritectic reaction had a larger segregation range than non-peritectic steels ascribed to trapping of the alloying atoms in liquid by austenite acting as a diffusion barrier. Subsequent, post-solidification cooling through the single phase austenite field decreased the microsegregation level, although the last γ →α phase transformation did affect the segregation profile in the solute-depleted dendrite centre. Simulation indicates that segregation levels could be reduced by decreasing either secondary dendrite arm spacing or adopting faster cooling rates through solidification.
Original languageEnglish
Pages (from-to)1337-1346
Number of pages10
JournalMaterials Science and Technology (United Kingdom)
Volume35
Issue number11
Early online date10 Jun 2019
DOIs
Publication statusPublished - 24 Jul 2019

Keywords

  • Microsegregation characterisation
  • microsegregation modelling
  • DICTRA
  • solidification
  • HSLA continuously cast steel

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • General Materials Science

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