Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-25T15:37:16.221Z Has data issue: false hasContentIssue false
  • English
  • Français

High Temperature Ductility Minimum in Rapidly Solidified Ni3Al - B

Published online by Cambridge University Press:  21 February 2011

A. I. Taub ,
S. C. Huang  and
K. M. Chang
A. I. Taub
Affiliation:
General Electric Corporate Research and Development, PO Box 8, Schenectady, NY 12309
S. C. Huang
Affiliation:
General Electric Corporate Research and Development, PO Box 8, Schenectady, NY 12309
K. M. Chang
Affiliation:
General Electric Corporate Research and Development, PO Box 8, Schenectady, NY 12309
Get access

Abstract

The elevated temperature mechanical properties of rapidly solidified, boron doped Ni3Al have been investigated. Melt spun ribbon, plasma deposits and HIP'ped powder were tested with the same general results. It was found that the boron doped, rapidly solidified alloy exhibits an increasing flow stress with increasing temperature similar to that reported for conventionally cast Ni3Al. In addition, the rapidly solidified alloys exhibited a severe ductility minimum in the range 500–750C. The ductility minimum is relatively insensitive to both boron and aluminum concentration, but the embrittlement onset temperature changes with processing and testing parameters. In all cases, the onset of the ductility drop coincides with the onset of the decrease of the flow stress. It is postulated that this behavior is due to a change in the flow mechanism at elevated temperature to one that is associated with grain boundary stress concentration.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 39: Symposium G – High-Temperature Ordered Intermetallic Alloys I , 1984 , 221
Copyright
Copyright © Materials Research Society 1985

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. Guard, R.W. and Westbrook, J.H., Met. Trans. 215 (1959) 807.Google Scholar
2. Thornton, P.H., Davies, R.G. and Johnston, T.L., Met. Trans. 1 (1970) 207.Google Scholar
3. Noguchi, O., Oya, Y. and Suzuki, T., Met. Trans. 12A (1981) 1647.Google Scholar
4. Aoki, K. and Izumi, O., J. Mat. Sot. 14 (1979) 1800.Google Scholar
5. Aoki, K. and Izumi, O., Kinzoko 49 (1979) 38.Google Scholar
6. Aoki, K. and Izumi, O., J. Japan Inst. Met. 43 (1979) 1190.Google Scholar
7. Liu, C.T., White, C.L., Koch, C.C. and Lee, E.H., Proceedings of the Electrochemical Society on High Temperature Materials, ed. Cubicciotti, Munir, Vol. 83–7, Electrochemical Society Inc. (1983) p. 32.Google Scholar
8. Liu, C.T., White, C.L. and Horton, J.A., Acts Met, in press.Google Scholar
9. Taub, A.I., Huang, S.C. and Chang, K.M., Met. Trans. 42A (1984) 399.CrossRefGoogle Scholar
10. Chang, K.M., Huang, S.C. and Taub, A.I., submitted to MRS Symposia Proceedings: “Rapidly Solidified Metastable Materials”, Nov. 1983, Boston, MA.Google Scholar
11. Huang, S.C., Taub, A.I. and Chang, K.M., Acts Met., in press.Google Scholar
12. Huang, S.C. and Ritter, A.M.: “Proc. AIME Symposium Chemistry and Physics of Rapidly Solidified Materials”, St. Louis, MO, Oct. 26–27, 1982, Berkowitz, B.J. and Scattergood, R.O., Eds., TMS-AIME, Warrendale, PA, 1983, pp. 25–34.Google Scholar
13. Jackson, M.R., Rairden, J.R., Smith, J.S. and Smith, R.W., J. Metals 33 (1981) 23.Google Scholar
14. Chang, K.M., Taub, A.I. and Huang, S.C., these proceedings.Google Scholar
15. Taub, A.I., Huang, S.C., Jackson, M.R., and Hall, E.L., MRS Symposia Proceedings: “Rapidly Solidified Metastable Materials”, Nov. 1983, Boston, MA, in press.Google Scholar
16. Liu, C.T., private communication.Google Scholar
17. Taub, A.I., Huang, S.C. and Chang, K.M., Proceedings of 39th Symposium of Mechanical Failures Prevention Group, Gaithersburg, MD, May 1–3, 1984, Cambridge University Press, in press.Google Scholar
18. Liang, S.J. and Pope, D.P., Acts Met (1977) 485.CrossRefGoogle Scholar
19. Woodford, D.A., Met. Trans. 12A (1981) 299.Google Scholar
20. Bricknell, R.H. and Woodford, D.A., Met. Trans. 12A (1981) 425.CrossRefGoogle Scholar
21. Chang, W.H.: “Superalloys-Processing, Proc. 2nd Intl. Conf. on Superalloys, Sec. V”, MCIC-72–10, 1972.Google Scholar
22. White, C.L. and Stein, D.F., Met. Trans. 9A (1978) 13.Google Scholar
23. Lozinskiy, M.G., Volkogon, G.M., and Pertsovskiy, N.Z., Russ. Met. 5 (1967) 65.Google Scholar
24. Taub, A.I., unpublished research.Google Scholar