Simplified three-dimensional macro segregation simulation model and its application to directional solidification of Sn-Bi alloys

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

3 Citations (Scopus)

Abstract

A simplified macro segregation simulation model that can be applied to three-dimensional channel type macro segregation prediction is proposed. The model consists of thermosolutal convection analysis, heat transfer analysis and solidification analysis with utilizing "jump condition" for taking remelting phenomena into calculation. Lateral directional solidification experiments of Sn-Bi alloys with permanent mold were carried out to examine the effectiveness of the proposed simulation model. Two- and three-dimensional calculations by the proposed model were performed to simulate the channel segregation observed in the experiments. Also, three-dimensional observations by X-ray CT were performed to examine the stereoscopic structure of the channel segregations. Many channel segregations were observed in the experiments and similar channel segregations were simulated in the calculations. Observed number of channel segregation were decreased when the mold coolant temperature were decreased. According to the simulated results, evaluation by total variant of solute concentration distribution was effective to predict the number of channel segregation. Moreover, pour out technique was used to observe overhang solidification front shape caused by Bi concentration in bottom. Similar solidification front shape was successfully simulated by the model.

Original languageEnglish
Title of host publicationProceedings from the 12th International Conference on Modeling of Casting, Welding, and Advanced Solidification Processes
Pages303-310
Number of pages8
Publication statusPublished - 2009 Dec 1
Event12th International Conference on Modeling of Casting, Welding, and Advanced Solidification Processes - Vancouver, BC, Canada
Duration: 2009 Jun 72009 Jun 14

Publication series

NameProceedings from the 12th International Conference on Modeling of Casting, Welding, and Advanced Solidification Processes

Other

Other12th International Conference on Modeling of Casting, Welding, and Advanced Solidification Processes
CountryCanada
CityVancouver, BC
Period09/6/709/6/14

Keywords

  • Channel segregation
  • Macrosegregation
  • Simulation
  • Solidification

ASJC Scopus subject areas

  • Process Chemistry and Technology
  • Computational Mechanics
  • Mechanical Engineering

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