Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Influence of Zr Addition on TiB2 Modification and Grain Size in Aluminium Alloys

알루미늄 합금에서 Zr첨가가 TiB2의 변형과 결정립크기에 미치는 영향

  • Kang, Won-Duck (Department of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Park, Hyun Gyoon (Department of Advanced Materials Engineering, Korea Polytechnic University)
  • 강원덕 (한국산업기술대학교 신소재공학과) ;
  • 박현균 (한국산업기술대학교 신소재공학과)
  • Received : 2011.04.18
  • Published : 2011.08.25
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Abstract

The poisoning effect of Zr in aluminum alloys was investigated by analyzing the filtered cakes of aluminum alloy melt taken with the $Prefil^{(R)}$ footprinter through a variety of analytic instruments, SEM/EDX, Auger, and TEM. Experimental results indicated that the morphology and chemical composition of the aluminum alloys were not modified with the addition of Zr, which is to previous belief that Zr poisoning is caused by modification of $(Ti_{1-x}Zr_x)Al_3$. On the other hand, $TiAl_3$ surroundig $TiB_2$ particles was modified and its lattice parameter was more mismatched by increasing Zr content, leading to less nucleation rate. This is also supported by the observation that the poisoning effect is reduced when Ti is added, resulting in a lower content ratio of Zr to Ti. These results suggest that extra Ti should be added to eliminate the poisoning effect of Zr in aluminum alloys containing Zr.

Keywords

Acknowledgement

Supported by : 성훈엔지니어링(주)

References

  1. P.S. Mohanty and J.E. Gruzleski, Acta metall. mater. 43, 2009, 2011 (1995).
  2. P.S. Mohanty and J.E. Gruzleski, Acta metall. mater. 44, 3760 (1996).
  3. Mats Johnsson, Z. Metalkd, 85, 789 (1994).
  4. J.A. Marcantonio and L.F. Mondolfo, Metall. Tras. 2, 471 (1971).
  5. D.G. McCartney, Inter. Materials Rewiews 34, 259 (1989).
  6. P. Schumacher and A.L. Greer, Mater. Sci. Eng. A181/A182, 1337 (1994).
  7. P. Schumacher and A.L. Greer, Light metals 875 (1995).
  8. P. Schumacher and A.L. Greer, Proc. Conf. 'Light metals' 751 (1996).
  9. P. Schumacher, A.L. Greer, J. Worth, P.V. Evans, M.A. Kearns, P. Fisher, and A.H. Green, Mater. Sci. Technol. 14, 403 (1998).
  10. P. Schumacher and A.L. Greer, Mater. Sci. Eng. A226-228, 798 (1997).
  11. G.P. Jones and J. Pearson, Metall. Trans. B. 7B, 228, 233, 234 (1975).
  12. J.A. Spittle and S. Sadli, Mater. Sci.Technol 11, 536 (1995).
  13. M.A. Easton and D.H. Stjohn, Acta Mater. 49, 1876 (2001).
  14. A.M. Bunn, P. Schumacher, M.A. Kearns, C. B. Bboothroyd, and A.L. Greer, Mater. Sci. Tech. 15, 1120, 1121 (1999).
  15. Ahmed. A. Abdel-Hamid, Z. Grain Refinement in Al Alloys 2, 645 (1989).
  16. Ahmed. A. Abdel-Hamid and A.I.O. Zaid, Advances in Mechanical and Production 336 (2000).
  17. T.V. Atamanenko, D.G. Eskin, M. Sluiter, and L. Katgerman, Journal of Alloys and Compounds 509, 60 (2011).
  18. Hugh Baker(editor), ASM Handbook, Alloy phase diagrams 3, 2-85, 2-380 (1987).
  19. N.L. Yue, L. Lu, and M.O. Lai, Composite Structures 47, 693 (1999).
  20. B.S. Murty, S. A. Kori, K. Venkateswarlu, R. R. Bhat, and M. Chakraborty, J. Mater. Pro. Tech. 89-90, 158 (1999).
  21. Jonas Fjellstedt and Anders E.W. Jarfors, Mater. Sci. Eng. A413-414, 530 (2005).
  22. J.D. Robson and P.B. Prangnell, Mater. sci. Eng. A352, 249 (2003).