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Analysis of Diffusional Solidification in a Wide-Gap Brazing Powder Mixture Using Differential Scanning Calorimetry

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Abstract

The diffusional solidification (DS) of a mixed powder system, consisting of pure Ni base metal powder and BNi-2 braze powder, suitable for wide-gap brazing was investigated using differential scanning calorimetry (DSC) and parallel microstructural examination. It was determined that very little interdiffusion between the powders developed in the solid state prior to braze powder melting. Once liquid formed, rapid DS occurred such that, when the powders were loosely mixed together, only 20 to 50 wt pct of the potential liquid fraction actually developed, leading to poor densification. Separating the braze and Ni into a layered structure leads to less DS, increased liquid formation (i.e., 35 to 80 wt pct of the potential liquid fraction) and improved densification. The rate of isothermal solidification in layered structures consisting of 30 and 40 wt pct BNi-2 braze material was determined using DSC. After 30 minutes of braze time at 1323 K (1050 °C), complete IS occurred, thus avoiding the formation of a continuous network of large borides. The final microstructure of the IS mixtures consisted of a continuous matrix of solid solution Ni, with isolated and dispersed borides.

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References

  1. O.A. Ojo, N.L. Richards and M.C. Charturvedi: Sci. Technol. Weld. Joining, 2004, vol. 9, pp. 209-220.

    Article  Google Scholar 

  2. C.E. Campbell and W.J. Boettinger: Metall. Trans. A, 2000, vol. 31A, pp. 2835-2847.

    Article  Google Scholar 

  3. M.A. Arafin, M. Medraj, D.P. Turner and P. Bocher, Mat. Sci. Eng. A, 2007, vol. 447A, pp. 125-133.

    Article  Google Scholar 

  4. O.A. Idawu, N.L. Richards, and M.C. Charturvedi: Mater. Sci. Eng. A, 2005, vol. 397, pp. 98–112.

  5. X. Huang, and W. Miglietti: J. Eng. Gas Turbines Power, 2012, vol. 134, Article No. 010801-1.

  6. S. Schoonbaert, X. Huang, S. Yandt, and P. Au: J. Eng. Gas Turbines Power, 2008, vol. 130, Article No. 032101-1.

  7. N.C. Sheng, J.D. Liu, T. Jin, X.F. Sun, and Z.Q. Hu: Metall. Mater. Trans. A, 2013, vol. 44A, pp. 1793-1804.

    Article  Google Scholar 

  8. X.W. Wu, R.S. Schandel, H.P. Seow and H. Li: J. Mater. Process. Technol., 2001, vol. 113, pp. 215-221.

    Article  Google Scholar 

  9. X. Huang, D. Nagy, and W. Chen: Proc. ASME Turbo Expo: Power Land, Sea, Air, 2009, pp. 721–29.

  10. X. Huang, S. Yandt, D. Nagy, and M. Yao: Proc. ASME Turbo Expo: Power Land, Sea, Air, 2007, pp. 25–33.

  11. D. M. Turriff and S.F. Corbin: Metall. Mater. Trans. A, 2008, vol. 39A, pp. 28-38.

    Article  Google Scholar 

Download references

Acknowledgments

The authors would like to thank the Natural Science and Engineering Research Council of Canada (NSERC) and Pratt and Whitney Canada for their financial support of this research. They would also like to thank Nick Koch for performing some of the experimental work presented in this paper and Cathy Whitman for useful discussions concerning this work.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Dalhousie University, 1360 Barrington Street, Box 15000, Halifax, NS, B3H 4R2, Canada

    Stephen F. Corbin (P.Eng, NSERC/Pratt and Whitney Canada Industrial Research Chair)

  2. Department of Civil and Resource Engineering, Dalhousie University, 1360 Barrington Street, P.O. Box 15000, Halifax, NS, B3H 4R2, Canada

    D. Clark Murray (Research Associate, Materials Laboratory Manager)

  3. Manufacturing Technology Development & Capital, Pratt and Whitney Canada, 1000 Marie-Victorin Blvd., Longueuil, QC, J4G 1A1, Canada

    Alain Bouthillier (Manager, Fellow Special Processes)

  4. STELIA North America, Lunenberg, NS, Canada

    D. Clark Murray (Research Associate, Materials Laboratory Manager)

Authors
  1. Stephen F. Corbin
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  2. D. Clark Murray
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  3. Alain Bouthillier
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Correspondence to Stephen F. Corbin.

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Manuscript submitted February 15, 2016.

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Corbin, S.F., Murray, D.C. & Bouthillier, A. Analysis of Diffusional Solidification in a Wide-Gap Brazing Powder Mixture Using Differential Scanning Calorimetry. Metall Mater Trans A 47, 6339–6352 (2016). https://doi.org/10.1007/s11661-016-3799-6

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  • DOI: https://doi.org/10.1007/s11661-016-3799-6

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