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 language | English |
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Pages (from-to) | 1337-1346 |
Number of pages | 10 |
Journal | Materials Science and Technology (United Kingdom) |
Volume | 35 |
Issue number | 11 |
Early online date | 10 Jun 2019 |
DOIs | |
Publication status | Published - 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