Hostname: page-component-848d4c4894-wg55d Total loading time: 0 Render date: 2024-05-08T19:05:45.644Z Has data issue: false hasContentIssue false
  • English
  • Français

Cryomilling of Nano-Phase Dispersion Strengthened Aluminum

Published online by Cambridge University Press:  21 February 2011

M. J. Luton ,
C. S. Jayanth ,
M. M. Disko ,
S. Matras  and
J. Vallone
M. J. Luton
Affiliation:
Corporate Science Research Laboratories, Exxon Research and Engineering Company, Annandale, NJ 08801
C. S. Jayanth
Affiliation:
Corporate Science Research Laboratories, Exxon Research and Engineering Company, Annandale, NJ 08801
M. M. Disko
Affiliation:
Corporate Science Research Laboratories, Exxon Research and Engineering Company, Annandale, NJ 08801
S. Matras
Affiliation:
Corporate Science Research Laboratories, Exxon Research and Engineering Company, Annandale, NJ 08801
J. Vallone
Affiliation:
Corporate Science Research Laboratories, Exxon Research and Engineering Company, Annandale, NJ 08801
Get access

Abstract

In recent years considerable effort has been expended on the development of dispersion strengthened alloys by mechanical alloying. Our research has shown that considerable improvement in microstructure control and properties can be gained by carrying out milling at cryogenic temperatures. We have found that aluminum and dilute aluminum alloys can be dispersion strengthened with aluminum oxy-nitride particles by the use of a slurry milling technique where the fluid medium is liquid nitrogen. The alloyed powders produced by this technique are strengthened by aluminum oxy-nitride particles which are typically 2–10 nm in diameter and with a mean spacing of 50–100 nm. The dispersoids are generated during the milling process by adsorption and reaction with components of the liquid nitrogen bath. On thermal treatment prior to consolidation, the alloyed powders recrystallize to a grain size which is typically in the range 0.05 to 0.3 μm. The alloys exhibit a yield stress in excess of 325 MPa at room temperature and a virtually temperature independent yield stress of about 130 MPa at temperatures greater than 375° C. The paper describes the preparation of dispersion strengthened aluminum by cryomilling, the characteristics of the microstructure and discusses some aspects of the mechanical properties.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 132: Symposium G – Multicomponent Ultrafine Microstructures , 1988 , 79
Copyright
Copyright © Materials Research Society 1989

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. Shewfelt, R.S.W. and Brown, L.M., Phil. Mag. 30, 1135 (1974).CrossRefGoogle Scholar
2. Lund, R.W. and Nix, W.D., Acta metall. 24, 469 (1976).Google Scholar
3. Pharr, G.M. and Nix, W.D., Scripta metall. 10, 1007 (1976).CrossRefGoogle Scholar
4. Hausselt, J.H. and Nix, W.D., Acta metall. 25, 1491 (1977).Google Scholar
5. Petkovic-Luton, R., Srolovitz, D.J. and Luton, M.J., in Proc. Frontiers of High Temperature Materials II, edited by Benjamin, J.S. and Benn, R.C. (INCO Alloys International, New York,1984), p. 73.Google Scholar
6. Srolovitz, D.J., Petkovic-Luton, R. and Luton, M.J., Phil. Mag. A 48, 795 (1983); Scripta metall. 18, 1063 (1984); Acta metall. 31, 2151 (1983).Google Scholar
7. Srolovitz, D.J., Luton, M.J., Petkovic-Luton, R., Barnett, D.M. and Nix, W.D., Acta metall. 32, 1079 (1984).Google Scholar
8. Artz, E. and Wilkinson, D.S., Acta metall. 34, 1893 (1986).Google Scholar
9. Rösler, J. and Artz, E., Acta metall. 36, 1043 (1988).Google Scholar
10. Artz, E. and Rösler, J, Acta metall. 36, 1053 (1988).Google Scholar
11. Sundaresan, R. and Froes, F.H., J. of Metals, August, 1987, p 22.Google Scholar
12. Gilman, P.S. and Benjamin, J.S., Ann. Rev. Mater. Sci. 13, 279 (1983).Google Scholar
13. Benjamin, J.S. and Schelleng, R.D., Met. Trans. 12A, 1827 (1981).Google Scholar
14. Oliver, W.C. and Nix, W.D., Acta. Metall. 30, 1335 (1982).Google Scholar
15. Kim, Y.M., in PM Aerospace Materials, Vol.1, Berne, Switzerland, November 12–14, 1984.Google Scholar
16. Bane, S.J., Bradefield, J. and Edwards, M.R., Matl. Sci. Tech. 2, 1025 (1986).Google Scholar
17. Luton, M.J., U.S. Patent No. 4 599 214 (8 July 1986); U.S. Patent No. 4 601 650 (22 July 1986).Google Scholar
18. Shuman, H. and Kruit, P., Rev. Sci. Instr. 56, 231 (1985).Google Scholar
19. Disko, M.M. and Shuman, H., Ultramicroscopy 20, 43 (1986).Google Scholar
20. Egerton, R.F., Electron Energy Loss Spectroscopy, (Plenum Press, New York, 1986).Google Scholar
21. Ashby, M.F., in Oxide Dispersion Strengthening, (AIME, New York, 1966), p. 143 Google Scholar
22. Anderson, M.P., Unpublished Research, Exxon Research and Engineering, Annandale, NJ 08801.Google Scholar
23. Sellars, C.M. and Petkovic-Luton, R., Mater. Sci. Eng. 46, 75 (1980).Google Scholar
24. Robinson, S.L. and Sherby, O.D., Phys. Status Solidi A1, K199 (1970).Google Scholar