Effects of Ni, Co, B, and Ge on the microstructures and mechanical properties of Nb-Ti-Si ternary alloys

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• 作者：Qiang Huang (1) (2)
  Yongwang Kang (1)
  Jinxia Song (1)
  Shiyu Qu (1)
  Yafang Han (1)
  Xiping Guo (2)
  
• 关键词：intermetallics ; solidification ; mechanical properties ; scanning electron microscopy ; alloying element
• 刊名：Metals and Materials International
• 出版年：2014
• 出版时间：May 2014
• 年：2014
• 卷：20
• 期：3
• 页码：475-481
• 全文大小：
• 参考文献：1. B. P. Bewlay, M. R. Jackson, and J. C. Zhao, / MRS Bulletin 28, 646 (2003). CrossRef
  2. B. P. Bewlay, M. R. Jackson, and J. C. Zhao, / Metall. Mater. Trans. A 34A, 2043 (2003). CrossRef
  3. J. C. Zhao, J. H. Westbrook, and Guest Editors, / MRS Bulletin 28, 622 (2003). CrossRef
  4. S. J. Balsone, B. P. Bewlay, and M. R. Jackson, / Proc. International Symposium on Structural Intermetallics, p.99, Minerals, Metals and Materials Society (TMS), United States (2001).
  5. M. R. Jackson, R. G. Rowe, and D. W. Skelly, / Mat. Res. Soc. Symp. Proc. 1339, (1995).
  6. B. P. Bewlay, M. R. Jackson, and H. A. Lipsitt. / J. Phase Equilibria 18, 264 (1997). CrossRef
  7. B. P. Bewlay, M. R. Jackson, and R. R. Bishop. / J. Phase Equilibria 19, 577 (1998). CrossRef
  8. P. R. Subramanian, M. G. Mendiratta, D. M. Dimiduk, / Mat. Res. Soc. Symp. Proc. 491 (1994).
  9. B. P. Bewlay, M. R. Jackson, and M. F. X. Gigliotti, / Intermetallic Compounds: Principles and Practice, Vol. 3, 541, (2001). CrossRef
  10. S. Y. Qu, Y. F. Han, and L. G. Song, / Intermetallics 15, 810 (2007). CrossRef
  11. G. Shao, / Intermetallics 13, 69 (2005). CrossRef
  12. J. Geng, G. Shao, and P. Tsakiropoulos, / Intermetallics 14, 832 (2006). CrossRef
  13. B. P. Bewlay, Y. Yang, and R. L. Casey, / Intermetallics 17, 120 (2009). CrossRef
  14. G. Shao, / Intermetallics 12, 655 (2004). CrossRef
  15. J. C. Zhao, B. P. Bewlay, and M. R. Jackson, / Intermetallics 9, 681 (2001). CrossRef
  16. Y. Yang, Y. A. Chang, and J. C. Zhao, / Intermetallics 11, 407 (2003). CrossRef
  17. J. C. Zhao, B. P. Bewlay, and M. R. Jackson, / Structural Intermetallics 2001: Proc. Third International Symposium on Structural Intermetallics, 483, Minerals, Metals and Materials Society (TMS), United States (2001).
  18. C. L. Ma, Y. Tan, and H. Tanaka, / Mater. Trans. 41, 1329 (2000). CrossRef
  19. C. L. Ma, Y. Tan, and A. Kasama, / Mater. Trans. 43, 688 (2002). CrossRef
  20. C. L. Ma, J. G. Li, and Y. Tan, / Mater. Sci. Eng. A 386, 375 (2004). CrossRef
  21. S. Miura, M. Aoki, and Y. Saeki, / Metall. Mater. Trans. A 36, 489 (2005). CrossRef
  22. S. Miura, Y. Murasato, and Y. Sekito, / Mater. Sci. Eng. A 510-11, 317 (2009). CrossRef
  23. Y. X. Tian, J. T. Guo, and L. Y. Sheng, / Intermetallics 16, 807 (2008). CrossRef
  
• 作者单位：Qiang Huang (1) (2)
  Yongwang Kang (1)
  Jinxia Song (1)
  Shiyu Qu (1)
  Yafang Han (1)
  Xiping Guo (2)
  
  1. Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing, 100095, China
  2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China
  
• ISSN：2005-4149

文摘

Nb-Si in situ composites with a nominal composition of Nb-22Ti-12Si-X (at.%, X represents Ni, Co, B, or Ge) are prepared using non-consumable arc melting technology. The effects of the alloying elements on the microstructures and mechanical properties are investigated. The Nb-22Ti-12Si ternary alloy consists of Nbss and Nb3Si. A new phase of Ti2Ni or Ti2Co is introduced into the ternary system after adding Ni or Co. The addition of 6% Ge promotes the formation of Nb5Si3 and creates significantly finer microstructures. The values of the high temperature strength and room temperature fracture toughness of Nb-22Ti-12Si-6Ge are 566.33MPa and 12.81 MPa·m1/2, respectively, which are approximately 88.2% and 18.5% higher than those of Nb-22Ti-12Si (300.98 MPa and 10.81 MPa·m1/2). The addition of 3% B changed the morphological features and induced the appearance of large fine rosettes, which is favorable for restraining the crack propagation, and it also leads to a 22.3% increase in room temperature fracture toughness compared with the Nb-22Ti-12Si ternary alloy.