Macrosegregation in a multicomponent low alloy steel

T. Fujii, David R Poirier, M. C. Flemings

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

Macrosegregation theory is extended to predict the formation of channel-type segregation for multicomponent systems. Specifically, calculations are carried out for 0.7 pct C steel, by considering heat, mass and momentum transport in the mushy zone. In the model used for calculations the momentum transport equation and the energy equation were solved simultaneously. It is confirmed, by comparing calculated results with experimental results, that this model successfully predicts the occurrence of channel-type segregation. This analysis is also more rigorous than previous works on macrosegregation because previous analyses were done by solving for convection in the mushy zone with an "uncoupled" temperature field. Using the model, the effects of adjusting the compositions of silicon and molybdenum in steel were quantitatively evaluated in order to show how channel-type segregates can be avoided by adjusting alloy composition. A method of optimizing composition to minimize segregation is presented. It is recommended that this methodology be applied to alloy design so that ingots of alloys amenable to commercial practice can be obtained readily with a minimum amount of "trial-and-error" development work and expense.

Original languageEnglish (US)
Pages (from-to)331-339
Number of pages9
JournalMetallurgical Transactions B
Volume10
Issue number3
DOIs
StatePublished - Sep 1979

Fingerprint

high strength steels
High strength steel
mushy zones
Momentum
adjusting
Chemical analysis
steels
momentum
Molybdenum
Steel
ingots
Silicon
Ingots
molybdenum
Carbon steel
Temperature distribution
temperature distribution
convection
occurrences
methodology

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry
  • Mechanics of Materials
  • Engineering(all)

Cite this

Macrosegregation in a multicomponent low alloy steel. / Fujii, T.; Poirier, David R; Flemings, M. C.

In: Metallurgical Transactions B, Vol. 10, No. 3, 09.1979, p. 331-339.

Research output: Contribution to journalArticle

Fujii, T. ; Poirier, David R ; Flemings, M. C. / Macrosegregation in a multicomponent low alloy steel. In: Metallurgical Transactions B. 1979 ; Vol. 10, No. 3. pp. 331-339.
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