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Characterization of the Early Stages of Phase Separation by Atom probe Tomography

  • M. K. Miller (a1)
Abstract

An atom probe tomography characterization of the early stages of phase separation in the FeCu-Ni system has been performed. The development of the copper-enriched regions into copper precipitates has been investigated during isothermal ageing at 573 K and 673 K for times up to 10,000 h. The formation and growth of the secondary precipitates in the nickel based superalloy, Alloy 718, have been determined during isothermal ageing at 873 K. These secondary precipitates were found to be a mixture of the L12-ordered γ' phase and the DO22-ordered γ” phase.

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1. Miller, M. K., Atom Probe Tomography: Plenum Press, NY, in press.
2. Miller, M. K., Russell, K. F., Pareige, P., Starink, M. J. and Thomson, R. C., Mater. Sci. Eng, A250, 49 (1998).
3. Burke, M. G. and Miller, M. K., J. de Physique, 50–C8, 395 (1989).
4. Miller, M. K. and Burke, M. G., in Alloy Phase Stability and Design, edited by Stocks, G. M., Pope, S. P. and Giamei, A. F. (Mater. Res. Soc. Proc. 186, Pittsburgh, PA, 1991), pp. 223228.
5. Burke, M. G. and Miller, M. K., in Alloy Phase Stability and Design, edited by Stocks, G. M., Pope, S. P. and Giamei, A. F. (Mater. Res. Soc. Proc. 186, Pittsburgh, PA, 1991), pp. 215218.
6. Burke, M. G. and Miller, M. K., Superalloys 718, 625 and Various Derivatives, edited by Loria, E. A., (The Minerals, Metals and Materials Society Proc., Warrendale, PA, 1991) pp. 337350.
7. Miller, M. K., Babu, S. S. and Burke, M. G., Mater. Sci. Eng., A270, 14 (1999).
8. Miller, M. K., Proc. Int. Conf. Solid-Solid Phase Transformations PTM'99, edited by Koiwa, M., Otsuka, K. and Miyazaki, T. (The Japan Institute of Metals, Sendai, Japan, 1999) 7376.
9. Pariege, P., Doctoral Thesis, University of Rouen, France, 1994.
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  • EISSN: 1946-4274
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