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The mechanism of columnar-to-equiaxed transition during electromagnetic centrifugal solidification

  • Minghu Guo , Yuanshen Yang EMAIL logo , Fuan Hua and Zhuangqi Hu
Published/Copyright: February 8, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 95 Issue 9

Abstract

A series of Hastelloy C tubes were solidified under a centrifugal field with various conditions of bulk liquid flow obtained with a controllable electromagnetic field. Their macrostructures show that the columnar-to-equiaxed transition was promoted both by increasing electromagnetic stirring and by increasing the superheat, and the application of electromagnetic stirring at different times can also influence the percentage of the total area occupied by the equiaxed region. Mechanical damage of dendrites is the most probable mechanism for the promotion of the columnar-to-equiaxed transition with high velocity flows. The detachment of the nuclei originated in the chill zone can also promote the columnar-to-equiaxed transition.

Keywords: Solidification; Columnar-to-equiaxed transition; Electromagnetic stirring; Hastelloy
Yuansheng Yang Department of Superalloys Institute of Metal Research, Chinese Academy of Sciences 72 Wenhua Road, Shenyang, 110016 P. R.China Tel.: +8624 23971728 Fax: +86242389 1320

  1. The work is supported by the National Science Foundation of China (No. 59995444)

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Received: 2003-07-30
Accepted: 2004-05-07
Published Online: 2022-02-08

© 2004 Carl Hanser Verlag, München

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https://doi.org/10.1515/ijmr-2004-0154
Keywords for this article
Solidification; Columnar-to-equiaxed transition; Electromagnetic stirring; Hastelloy

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. 85 Years DGM
  5. Fachausschuss ,,Materialographie“
  6. Fachausschuss ,,Mechanische Oberflächenbehandlungen“
  7. Fachausschuss „Titan“
  8. Fachausschuss ,,Gefüge und Eigenschaften von Polymerwerkstoffen“
  9. Characterization of the fcc/bcc orientation relationship by EBSD using pole figures and variants
  10. Microstructural and thermodynamic study of γ-Ga2O3
  11. Spray forming of 2014-Al alloy based composites with injection of SiC particulates
  12. Size effects in the plastic deformation of NiAl thin films
  13. Fracture parameters of chevron-notched Al2O3/Nb sandwich specimens
  14. HVEM in situ study of fracture of Al2O3/Nb sandwich specimens
  15. Articles Basic
  16. Assessment of thermodynamic functions in the MgO–Al2O3–SiO2 system
  17. Derivation and consistency of the partial functions of a ternary system involving interaction coefficients
  18. Contribution to the zinc-rich side of the Ti–Zn system
  19. Measurement of the surface tension of liquid Ga, Bi, Sn, In and Pb by the constrained drop method
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  23. The mechanism of columnar-to-equiaxed transition during electromagnetic centrifugal solidification
  24. Notifications/Mitteilungen
  25. Personal/Personelles
  26. News/Aktuelles
  27. Books/Bücher
  28. Conferences/Konferenzen
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