Hostname: page-component-7bb8b95d7b-s9k8s Total loading time: 0 Render date: 2024-09-12T07:18:20.087Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructure and 1000–1400 K mechanical properties of cryomilled NiAl–0.7Zr

Published online by Cambridge University Press:  31 January 2011

J. D. Whittenberger ,
A. Garg  and
Mohan G. Hebsur
J. D. Whittenberger*
Affiliation:
NASA-Glenn Research Center at Lewis Field, Cleveland, OH 44135
A. Garg
Affiliation:
AYT Corp. at NASA-Glenn Research Center at Lewis Field, Cleveland, OH 44135
Mohan G. Hebsur
Affiliation:
OAI/NASA, GRC Group, Brookpark, OH 44142
*
a)e-mail: John.D.Whittenberger@grc.nasa.gov
Get access

Abstract

An attempt has been made to improve the intermediate temperature strength of cryomilled NiAl by utilizing third element solid solution or precipitation strengthening mechanisms. To this end an NiAl–0.7 (at.%) Zr alloy was cryomilled, densified by hot extrusion, and tested between 1000 and 1400 K. Although over 3 wt% nitrogen was introduced via cryomilling, mechanical testing revealed that the cryomilled NiAl–0.7Zr was significantly weaker than the base alloy between 1000 and 1200 K. Chemical and microstructural analyses revealed that, in addition to ∼ 16 vol% AlN, all the Zr had been converted into ZrN. A thermodynamic analysis of cryomilling indicated that the formation of ZrN could have been anticipated since it is a more stable nitride than AlN. While Zr was an unsatisfactory addition in NiAl, thermodynamics also suggest several alloying elements that might lead to good intermediate temperature strength after cryomilling.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 6 , June 1999 , pp. 2418 - 2429
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Whittenberger, J. D., Structural Intermetallics, edited by Darolia, R., Lewandowski, J. J., Liu, C. T., Martin, P. L., Miracle, D. B., and Nathal, M. V. (TMS, Warrendale, PA, 1993), pp. 819–828.Google Scholar
2.Hebsur, M. G., Whittenberger, J. D., and Garg, A., Structural Intermetallics, edited by Nathal, M.V., Darolia, R., Liu, C.T., Martin, P. L., Mircle, D.B., Wagner, R., and Yamaguchi, M. (TMS, Warrendale, PA, 1997), pp. 621–630.Google Scholar
3.Whittenberger, J.D. and Luton, M.J., J. Mater. Res. 10, 1171–1186 (1995).CrossRefGoogle Scholar
4.Whittenberger, J. D. and Noebe, R. D., Met. Mat. Trans. A 27A, 2628–2641 (1996).Google Scholar
5.Whittenberger, J. D., Solid State Powder Processing, edited by Clauer, A.H. and deBarbadillo, J. J. (The Minerals, Metals & Materials Society, Warrendale, PA, 1990), pp. 137–155.Google Scholar
6.Aikin, B. J. M., Dickerson, R. M., Jayne, D. T., Farmer, S. and Whittenberger, J. D., Scripta Metall. et Mater. 30, 119–122 (1994).CrossRefGoogle Scholar
7.Garg, A., Whittenberger, J.D., and Luton, M. J., in High-Temperature Ordered Intermetallic Alloys VII, edited by Koch, C. C., Liu, C. T., Stoloff, N. S., and Wanner, A. (Mater. Res. Soc. Symp. Proc. 460, Pittsburgh, PA, 1997), pp. 413–418.Google Scholar
8.Koch, C. C., Int. J. Mechanochem. Mech. Alloying 1, 56 (1994).Google Scholar
9.Gurvich, L. V., Iorish, V. S., Chekhovskoi, D. V., and Yungman, V. S., IVANTHERMO—A Thermodynasmic Database and Software System for the Personal Computer, NIST Special Database 5 (NIST, Gaithersburg, MD 20899, 1993).Google Scholar
10.Roine, A., Outokumpu HSC Chemistry for Windows (Outokumpu Research Oy Information Service, Pori, Finland, 1997).Google Scholar
11.Kubachewski, K.O., Trans. Faraday Soc. 54, 814 (1958).CrossRefGoogle Scholar
12.Steiner, A. and Komerek, K.L., Trans. TMS-AIME 230, 786–790 (1964).Google Scholar
13.Vedula, K., Pathare, V., Aslandis, I., and Titran, R.H., in High-Temperature Ordered Intermetallic Alloys, edited by Koch, C. C., Liu, C.T., and Stoloff, N.S. (Mater. Res. Soc. Symp. Proc. 39, Pittsburgh, PA, 1985), pp. 411–421.Google Scholar
14.Noebe, R.D., Bowman, R. R., and Nathal, N. V., Int. Mater. Rev. 38, 193–232 (1993).Google Scholar