Abstract
The formation and stability of Fe-rich precipitates in two α-Zr(Fe) single-crystal alloys with nominal compositions I, 50 parts per million by atom (ppma) Fe, and II, 650 ppma Fe, have been investigated. Optical microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to examine the characteristics of Fe-rich precipitates. The SEM and TEM micrographs showed that in as-grown alloy II, Zr2Fe precipitates were located at “stringers. ”Precipitates were not observed in as-grown alloy I. Annealing treatments below 700 °C, for alloy I, and 820 °C, for alloy II, resulted in the diffusion of excess Fe (above the α-phase solution limit) to the free surface with the subsequent formation of Zr3Fe precipitates in both alloys. Dissolution of Zr3Fe surface precipitates of alloy I (annealing above the solvus) left precipitate-like features on the surfaces. Zr2Fe precipitates in as-grown alloy II were readily dissolved by β-phase annealing.
Similar content being viewed by others
References
H. Nakajima, G.M. Hood, and R.J. Schultz:Phil. Mag. B, 1988, vol. 58, pp. 319–37.
B. Cox: inAdvances in Corrosion Science and Technology, M.G. Fontana and R.W. Staehle, eds., Plenum Press, New York, NY, 1976, vol. 5, p. 173.
B. Cheng and R.B. Adamson:Zirconium in the Nuclear Industry, 7th Symp., ASTM STP 939, ASTM, Philadelphia, PA, 1987, p. 387.
A.M. Garde:J. Nucl. Mater., 1979, vol. 80, p. 195.
G.M. Hood:Defect and Diffusion Forum, 1993, vols. 95-98, pp. 755–74.
A.D. King, G.M. Hood, and R.A. Holt:J. Nucl. Mater., 1991, vol. 185, pp. 174–81.
R.M. Kruger, R.B. Adamson, and S.S. Brenner:J. Nucl. Mater., 1992, vol. 189, p. 193.
R.M. Kruger and R.B. Adamson:J. Nucl. Mater., 1993, vol. 205, pp. 242–50
R.G. Fleck, J.E. Elder, A.R. Causey, and R.A. Holt: Report No. 10863, Atomic Energy of Canada Ltd. Research, Chalk River Laboratories, Chalk River, ON, Canada, June 1993.
F.A. Shunk:Constitution of Binary Alloys, McGraw-Hill, New York, NY, 1969, pp. 354–56.
F. Aubertin, U. Gonser, S.J. Campbell, and H.G. Wagner:Z. Metallkd., 1985, vol. 76, pp. 237–44.
D. Arias and J.P. Abriata:Bull. Alloy Phase Diagrams, 1988, vol. 9, pp. 597–604.
R. Borrelly, P. Merle, and L. Adami:J. Nucl. Mater., 1990, vol. 170, pp. 147–56.
H. Zou, G.M. Hood, J.A. Roy, R.J. Schultz, and J.A. Jackman:J. Nucl. Mater., in press.
G.M. Hood and R.J. Schultz:Defect and Diffusion Forum, 1989, vols. 66-69, pp. 371–76.
O.T. Woo, H. Zou, G.M. Hood, R.J. Schultz, and J.A. Roy: Atomic Energy of Canada Ltd. Research, Chalk River Laboratories, Chalk River, ON, Canada, unpublished research, 1993.
J.A. Sawicki, G.M. Hood, H. Zou, and R.J. Schultz: Atomic Energy of Canada Ltd. Research, Chalk River Laboratories, Chalk River, ON, Canada, unpublished research, 1993.
D.A. Porter and K.E. Easterling:Phase Transformations in Metals and Alloys, Van Nostrand Reinhold, London, 1984, pp. 215–19.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Zou, H., Hood, G.M., Roy, J.A. et al. Formation and stability of fe-rich precipitates in dilute Zr(Fe) single-crystal alloys. Metall Mater Trans A 25, 1359–1365 (1994). https://doi.org/10.1007/BF02665469
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02665469