Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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Effects of Titanium, Hafnium and Zircornium Alloying Elements on Microstructures and $D0_3{\leftrightarrow}B2$ Transition Temperature of Fe-30Al-5Cr Alloys

Fe-30Al-5Cr 합금의 미세조직 및 $D0_3{\leftrightarrow}B2$ 천이온도에 미치는 Ti, Hf 및 Zr의 첨가효과

  • Kim, Sung-Su (Dept. of Metallurgical Eng., Chonnam National University) ;
  • Joo, Sung-Min (Dept. of Metallurgical Eng., Chonnam National University) ;
  • Oh, Seon-Hun (Dept. of Metallurgical Eng., Chonnam National University) ;
  • Kim, Kwan-Hyu (Dept. of Metallurgical Eng., Chonnam National University) ;
  • Choi, Dap-Chun (Dept. of Metallurgical Eng., Chonnam National University)
  • Published : 2001.02.20
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Abstract

The changes in the microstructures and $D0_3{\leftrightarrow}B2$ transition temperature were investigated for Fe-30at.%AI-5at.%Cr alloy with the ordered $D0_3$, structure when Ti, Hf and Zr were added respectively. The addition of Cr has no effect on the microstructure. However, as the amount of Ti addition increased, the grain size became smaller. Addition of Ti+Hf, Ti+Zr and Ti+Hf+Zr also showed the similar effect. When 20at.% of Ti was added, the second phase precipitates on the substrate. The addition of Cr, Hf and Zr alone has no effect on $D0_3{\leftrightarrow}B2$ transition temperature. However, as the amount of Ti addition increased by 5, 10, 15 and 20at.%, the transition temperatures showed 929, 930, 960 and $930^{\circ}C$ respectively.

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References

  1. Acta Metall. v.36 M. H. Yoo;J. A. Horton;C. T. Liu
  2. Metall. Trans. v.1 P. H. Thornton;R. G. Davies;T. L. Johnston
  3. Acta Metall. v.32 V. Paidar;D. P. Pope;V. Vitek
  4. Rep. NASA Cont. Martin A. Crimp
  5. Scr. Metall. v.22 C. G. Mckamey;J. A. Horton;C. T. Liu
  6. NASA Tech. Memo. NASA Tech. Memo. J. R. Stephens
  7. J. Mat. Sci. v.22 R. L. Fleischer
  8. Heat Resistant Materials Heat Resistant Materials V. K. Sikka;K. Natesan(ed.);D. J. Tillack(ed.)
  9. In. Proc. 4th Annual Conference on Fossil Energy Materials In. Proc. 4th Annual Conference on Fossil Energy Materials C. G. Mckamey
  10. Oxidation of Metals v.12 I. M. Allam;D. P. Whittle;J. Stinger
  11. Oxidation of Metals v.30 C. A. Barret
  12. Metall. Trans. v.3 P. R. Swann;W. R. Duff;R. M. Fisher
  13. Trans. TMSAIME v.45 P. R. Swann;W. R. Duff;R. M. Fisher
  14. Mater. Res. Soc. Symp. Proc. v.41 K. Vedula;J. R. Stephens
  15. J. Kor. Inst. Met&Mater. v.36 K. I. Park;S. M. Joo;H. C. Choe;D. C. Choi
  16. Steel U.S.S.R. v.2 no.7 O. P. Elyutin;M. K. Khachatryan
  17. Metall. Trans. v.A The Addition Mn and Al to the Hydriding Compound FeTi D. Dew-Hughes
  18. Mat. Sci. & Eng. v.96 H. P. Longworth;D. E. Mikkola
  19. Materials Res. Soc. High Temperature Ordered Intermatallic Alloy M. G. Mendriatta;H. A. Lipsitt;C. C. Koch(ed.);C. T. Liu(ed.);N. S. Stoloff(ed.)
  20. Mater. Sci. Eng. v.91 R. Fortnum;D. E. Mikkola