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Bulletin of Materials Science

, Volume 28, Issue 6, pp 547–554 | Cite as

Effect of cerium addition on microstructures of carbon-alloyed iron aluminides

  • S. Sriram
  • R. Balasubramaniam
  • M. N. Mungole
  • S. Bharagava
  • R. G. Baligidad
Alloys

Abstract

The effect of Ce addition on the microstructure of carbon-alloyed Fe3Al-based intermetallic has been studied. Three different alloys of composition, Fe-18.5Al-3.6C, Fe-20.0Al-20C and Fe-19.2Al-3.3C-0.07Ce (in at%), were prepared by electroslag remelting process. Their microstructures were characterized using optical and scanning electron microscopies. Stereological methods were utilized to understand the observed microstructures. All the alloys exhibited a typical two-phase microstructure consisting of Fe3AlC carbides in an iron aluminide matrix. In the alloy without Ce addition, large bulky carbides were equally distributed throughout the matrix with many smaller precipitates interspersed in between. In the alloy with Ce addition, the carbide grain sizes were finer and uniformly distributed throughout the matrix. The effect of Ce addition on the carbide morphology has been explained based on the known effect of Ce in modifying carbide morphology in cast irons.

Keywords

Iron aluminide Fe3Al Ce addition microstructure stereology 

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References

  1. Balasubramaniam R 1996Scr. Mater. 34 127CrossRefGoogle Scholar
  2. Balasubramaniam R 1997J. Alloys Comp. 253-254 148CrossRefGoogle Scholar
  3. Baligidad R G and Radhakrishna A 2000Mater. Sci. Engg. A287 17CrossRefGoogle Scholar
  4. Baligidad R G, Prakash U, Ramakrishna Rao V, Rao P K and Ballal N B 1994Iron and Steel Making 21 324Google Scholar
  5. Baligidad R G, Prakash U, Radhakrishna A and Ramakrishna Rao V 1997aScr. Mater. 36 105CrossRefGoogle Scholar
  6. Baligidad R G, Prakash U, Radhakrishna A and Ramakrishna Rao V 1997bScr. Mater. 36 667CrossRefGoogle Scholar
  7. Kay D A R, Lu W K and McLean A 1975Rare earth-oxygen-sulfur reactions in molten steel, inSulfide inclusions in steel, Proceedings of an international symposium (eds) J J deBarbadillo and E Snape (Metals Park, USA: American Society for Metals) pp 23–43Google Scholar
  8. Laha T, Tewari A, Balasubramaniam R, Mungole M N and Baligidad R G 2004Met. Mater. Trans. A35 1789CrossRefGoogle Scholar
  9. Lin D, Shan A and Li D 1994Scr. Metall. Mater. 31 1455CrossRefGoogle Scholar
  10. Liu C T and Kumar K S 1993J. Metals 45 38Google Scholar
  11. Liu C T, Stiegler J O and Fores F H 1990aOrdered intermetallics, inMetals handbook (Metals Park, USA: American Society for Metals) 10 ed.,Vol. 2, pp 913–943Google Scholar
  12. Liu C T McKamey C G Lee E H 1990bScr. Metall. 24 385CrossRefGoogle Scholar
  13. Liu C T, McKamey C G and Lee E H 1996Scr. Metall. 23 875CrossRefGoogle Scholar
  14. McKamey C G and Liu C T 1992Scr. Metall. Mater. 24 119Google Scholar
  15. McKamey C G and Pierce D H 1993Scr. Metall. Mater. 28 1173CrossRefGoogle Scholar
  16. Parvathavarthini N, Prakash U and Dayal R K 2002Intermetallics 10 329CrossRefGoogle Scholar
  17. Prakash U and Sauthoff G 2001Scr. Mater. 44 73CrossRefGoogle Scholar
  18. Sen M and Balasubramaniam R 2000Scr. Mater. 44 619CrossRefGoogle Scholar
  19. Underwood E 1970Quantitative stereology (New York: Addison-Wesley Publishing Company) pp 25–103Google Scholar
  20. Yangshan S, Zhengjun Y S, Zhonghua Z and Haibo H 1995Scr. Metall. Mater. 33 811CrossRefGoogle Scholar
  21. Zhu Y F, Liu C T and Chen C H 1996Scr. Mater. 35 1435CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 2005

Authors and Affiliations

  • S. Sriram
    • 1
  • R. Balasubramaniam
    • 1
  • M. N. Mungole
    • 1
  • S. Bharagava
    • 1
  • R. G. Baligidad
    • 1
    • 2
  1. 1.Department of Materials and Metallurgical EngineeringIndian Institute of TechnologyKanpurIndia
  2. 2.Defence Metallurgical Research LaboratoryHyderabadIndia

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