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Effect of Cr Additions on Toughness, Strength, and Oxidation Resistance of an Nb-4Si-20Ti-6Hf Alloy at Room and/or High Temperatures

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Abstract

The mechanical properties and oxidation resistance of Nb-4Si-20Ti-6Hf-yCr alloys (where y = 6, 10, 14 at. pct) with an NbSS-dominant NbSS/Nb3Si/Nb5Si3 microstructure at room and/or high temperatures were primarily studied. It was found that at room temperature, fracture toughness was decreased by Cr additions, the fracture mode of the NbSS phase was intergranularly cleavage, and the silicides (Nb3Si and Nb5Si3) fractured in a brittle manner. It is interesting that strength as a function of Cr content is dependent on temperature. Up to 1423 K (1150 °C), the strength was improved by Cr additions, whereas above that temperature, the strength decreased. As the Cr content increased from 6 to 14 at. pct, for example, the yield strength σ 0.2 increased from 198 to 258 MPa at 1423 K (1150 °C) but decreased from 109 to 83 MPa at 1623K (1350 °C). Cr additions cannot improve the oxidation resistance of this NbSS-dominant microstructure considerably; the weight gain at 100 hours of air exposure at 1523 K (1250 °C) was 255 mg/cm2 at a nominal Cr content of 6 at. pct and 220 mg/cm2 at a Cr content of 14 at. pct.

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References

  1. B.P. Bewlay, J.J. Lewandowksi, and M.R. Jackson: JOM, 1997, vol. 49, pp. 44-46, 67.

    Article  CAS  Google Scholar 

  2. B.P. Bewlay, A. Lipsitt, M.R. Jackson, and W.J. Reeder: Mater. Sci. Eng. A, 1995, vol. 192/3A, pp. 534-43.

    Google Scholar 

  3. P.R. Subramanian, M.G. Mendiratta, and D.M. Dimiduk: JOM, 1996, vol. 48, pp. 33-43.

    CAS  Google Scholar 

  4. J.D. Rigney and J.J. Lewandowksi: Metall. Mater. Trans. A, 1996, vol. 27A, pp. 3293-3306.

    Google Scholar 

  5. M.G. Mendiratta and D.M. Dimiduk: Metall. Trans. A, 1993, vol. 24A, pp. 501-04.

    CAS  Google Scholar 

  6. M.G. Mendiratta, J.J. Lewandowski and D.M. Dimiduk: Metall. Mater. Trans. A, 1991, vol. 22A, pp. 1573-1583.

    CAS  Google Scholar 

  7. B.P. Bewlay, M.R. Jackson, and H.A. Lipsitt: Metall. Mater. Trans. A, 1996, vol. 27A, pp. 3801-08.

    Article  CAS  Google Scholar 

  8. B.P. Bewlay, M.R. Jackson, J.C. Zhao, and P.R. Subramanian: Metall. Mater. Trans. A, 2003, vol. 34A, pp. 2043-52.

    Article  CAS  Google Scholar 

  9. B.P. Bewlay, M.R. Jackson, and P.R. Subramanian: JOM, 1999, vol. 51, pp. 32-36.

    Article  CAS  Google Scholar 

  10. M. Fujikara, A. Kasama, R. Tannaka, and S. Hanada: Mater. Trans. JIM, 2004, vol. 45, pp. 493-501.

    Article  Google Scholar 

  11. J. Kim, T. Tabaru, M. Sakamoto, and S. Hanada: Mater. Sci. Eng. A, 2004, vol. 372A, pp. 137-44.

    Google Scholar 

  12. J.B. Sha, H. Hirai, T. Tabaru, H. Ueno, A. Kitahara, and S. Hanada: Metall. Mater. Trans. A, 2003, vol. 34A, pp. 85-94.

    Article  CAS  Google Scholar 

  13. C.L Ma, H. Tanaka, A. Kasama, R. Tanaka, Y. Mishima, and S. Hanada: Proc. High Temperature Ordered Intermetallic Alloys IX, Tokyo, Japan, 2001, pp. 646: N5.39.1-N5.39.6.

  14. J.B. Sha, H. Hirai, T. Tabaru, H. Ueno, A. Kitahara, and S. Hanada: Mater. Sci. Eng. A, 2003, vol. 343, nos. 1-2, pp. 282-89.

    Article  Google Scholar 

  15. M.R. Jackson, B.P. Bewlay, and J.C. Zhao: U.S. Patent: 0066578, 2003.

  16. J.C. Zhao and J.H. Westbrook: MRS Bull., September, 2003, pp. 622–30.

  17. B.P. Bewlay, M.R. Jackson, J.C. Zhao, P.R. Subramanian, M.G. Mendiratta, and J.J. Lewandowski: MRS Bull., September, 2003, pp. 646–53.

  18. K.S. Chan: Mater. Sci. Eng. A, 2002, vol. 329, pp. 513–22.

    Article  Google Scholar 

  19. M.R. Jackson, B.P. Bewlay, and R.G. Rowe: JOM, 1996, vol. 48, pp. 39–44.

    CAS  Google Scholar 

  20. J.L. Yu, K.F. Zhang, Z.K. Li, X. Zheng, G.F. Wang, and R. Bai: Scripta Mater., 2009, vol. 61, pp. 620–23.

    Article  CAS  Google Scholar 

  21. J. Geng, P. Tsakiropoulos, and G. Shao: Mater. Sci. Eng. A, 2006, vol. 441, nos. 1-2, pp. 26–38.

    Article  Google Scholar 

  22. G. Shao: Intermetallics, 2005, vol. 13, pp. 69–78.

    Article  CAS  Google Scholar 

  23. D.-Z. Wang and Y.-J. Pan: China Materials Engineering Canon Nonferrous Metals and Engineering, vol. 5, Chemistry Industry Press, Beijing, China, 2006 (in Chinese).

  24. J.B. Sha, H. Hirai, T. Tabaru, H. Ueno, A. Kitahara, and S. Hanada: Metall. Mater. Trans. A, 2003, vol. 34A, pp. 2861-71.

    Article  CAS  Google Scholar 

  25. T.B. Massalski: Binary Alloy Phase Diagrams, vol. 1, ASM, Materials Park, OH, 1990, p. 1511.

  26. K.S. Chan: Oxid. Met., 2004, vol. 61, pp. 165-94.

    Article  CAS  Google Scholar 

  27. F. Gesmundo, F. Viani, Y. Niu, and D.L. Douglass: Oxid. Met., 1993, vol. 39, pp. 197-209.

    Article  CAS  Google Scholar 

  28. D.Z. Yao, R. Cai, C.G. Zhou, J.B. Sha, and H.R. Jiang: Corros. Sci., 2009, vol. 51, pp. 364-70.

    Article  CAS  Google Scholar 

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Acknowledgments

The authors are grateful to the support from the Program for New Century Excellent Talents in Universities (NCET-06-0173) and the National Natural Sciences Foundation of P. R. China under contracts 50671002 and 51071009.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Beihang University, Beijing, 100191, P.R. China

    Jiangbo Sha (Professor) & Chungen Zhou (Professor)

  2. Division of Manufacturing Engineering, School of MAE, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore

    Jun Liu (Doctoral Student)

Authors
  1. Jiangbo Sha
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  2. Jun Liu
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  3. Chungen Zhou
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Correspondence to Jiangbo Sha.

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Manuscript submitted May 5, 2010.

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Sha, J., Liu, J. & Zhou, C. Effect of Cr Additions on Toughness, Strength, and Oxidation Resistance of an Nb-4Si-20Ti-6Hf Alloy at Room and/or High Temperatures. Metall Mater Trans A 42, 1534–1543 (2011). https://doi.org/10.1007/s11661-010-0549-z

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  • DOI: https://doi.org/10.1007/s11661-010-0549-z

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