Hostname: page-component-745bb68f8f-l4dxg Total loading time: 0 Render date: 2025-01-26T04:52:05.378Z Has data issue: false hasContentIssue false
  • English
  • Français

TEM Studies of Precipitate Growth at the Atomic Level

Published online by Cambridge University Press:  25 February 2011

J. M. Howe  and
R. Gronsky
J. M. Howe
Affiliation:
Department of Metallurgical Engineering and Materials Science, Carnegie-Mellon University, Pittsburgh, PA 15213
R. Gronsky
Affiliation:
National Center for Electron Microscopy, Lawrence Berkeley Laboratory, Berkeley, CA 94720
Get access

Abstract

Recent advances in transmission electron microscopy instrumentation and technique now make it possible to study the shape-evolution of precipitates in metallic alloys at the atomic level. This investigation demostrates how a combination of transmission electron microscopy techniques; namely, high-resolution electron microscopy, image simulation, energy-dispersive x-ray spectroscopy and convergent-beam electron diffraction are used to characterize the atomic structures, chemistry and growth mechanisms of γ' precipitate plates in an Al-4.2 a/o Ag alloy aged for 30 min. at 350°C. The complimentary information obtained from each of these techniques allows modelling of the growth process at the atomic level, thus providing insight into the basic precipitation behavior of alloys.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 62: Symposium Q – Materials Problem Solving with the Transmission Electron Microscope , 1985 , 241
Copyright
Copyright © Materials Research Society 1986

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

1. Hren, J.A. and Thomas, G., TMS-AIME, 227, 308 (1963).Google Scholar
2. Nicholson, R.B. and Nutting, J., Acta Met., 9, 332 (1961).Google Scholar
3. Laird, C. and Aaronson, H.I., Acta Met., 15, 73 (1967).Google Scholar
4. Howe, J.M., Aaronson, H.I. and Gronsky, R., Acta Met., 33, 639 (1985).CrossRefGoogle Scholar
5. Howe, J.M., Aaronson, H.I. and Gronsky, R., Acta Met., 33, 649 (1985).Google Scholar
6. Gronsky, R., Van Tendeloo, G. and Thomas, G., presented at the Acta/Scripta Conference, Sonnenberg, Germany, 1983 (LBL Report No. 17369, 1984).Google Scholar
7. O'Keefe, M.A. and Buseck, P.R., Trans. Amer. Cryst. Assoc., 15, 27 (1979).Google Scholar
8. Cliff, G. and Lorimer, G.W., J. Microscopy, 110, 107 (1975).Google Scholar
9. Sarikaya, M. and Thomas, G., in Analytical Electron Microscopy, edited by Williams, D.B. and Joy, D.C. (San Francisco Press, San Francisco, 1984), p. 97.Google Scholar
10. Howe, J.M., Sarikaya, M. and Gronsky, R., submitted to Acta Cryst.Google Scholar
11. Hirth, J.P. and Lothe, H., Theory of islocations, 2nd ed. (John Wiley and Sons, New York, 1982), p. 315.Google Scholar
12. Hirsch, Sir P., Howie, A, Nicholson, R.B., Pashley, D.W. and Whelan, M.J., Electron Microscopy of Thin Crystals, 2nd ed. (Robert E. Krieger Pub., Malibar, 1977), p. 178.Google Scholar
13. Aaronson, H.I., Lee, J.K. and Russell, K.C., in Precipitation Processes in Solids, edited by Russell, K.C. and Aaronson, H.I., (TMS-AIME, Warrendale, 1977), p. 31.Google Scholar
14. Howe, J.M., Ph.D. Thesis, University of California, Berkeley, 1985.Google Scholar
15. LeGouges, F.K., Wright, R.N., Lee, Y.W. and Aaronson, H.I., Acta Met., 32(10), 1865 (1984).Google Scholar
16. Christian, J.W., The Theory of Transformations in Metals and Alloys, 1st ed. (Pergamon Press, Oxford, 1965), p. 142.Google Scholar
17. Burton, W.K., Cabrera, N. and Frank, F.C., Phil. Trans. Roy. Soc. London, A 243, 299 (1950–1951).Google Scholar
18. Aaronson, H.I., in Decomposition of Austenite by Diffusional Processes, edited by Zackay, V.F. and Aaronson, H.I., (Interscience Pub., New York, 1962), p. 387.Google Scholar
19. Bulletin of Alloy Phase Diagrams, 1(1), 36 (1983).Google Scholar
20. Mondolfo, L.F., Aluminum Alloys: Structure and Properties, 1st ed. (Butterworths, London, 1979), p. 213.Google Scholar
21. Howe, J.M. and Gronsky, R., to be published in Ultramicroscopy.Google Scholar
22. Gjonnes, J. and Moodie, A.F., Acta Cryst., 19 65 (1965).CrossRefGoogle Scholar
23. Kilaas, R., unpublished research (1984).Google Scholar
24. Laird, C. and Aaronson, H.I., Acta Met., 17, 505 (1969).Google Scholar
25. Laird, C. and Aaronson, H.I., TMS-AIME, 242, 1437 (1968).Google Scholar