Abstract
The morphology and growth kinetics of the discontinuous precipitation and dissolution reactions in supersaturated Mg-Al solid solutions containing 7.3, 9.1 and 10.9 at % Al have been investigated by optical and scanning electron microscopy and X-ray measurements. The volume fraction of regions transformed by the discontinuous precipitation reaction, the reaction front velocity, the interlamellar spacing and the average composition of the solute-depleted lamellae were determined as a function of the temperature. For the first time, the kinetics of the discontinuous dissolution reaction has been studied in the Mg-Al system. It has been shown that the transport of the solute atoms during both reactions is governed by grain boundary diffusion.
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References
I. Kaur, Y. Mishin and W. Gust, “Fundamentals of Grain and Interphase Boundary Diffusion” (Wiley, Chichester/New York/Brisbane, 1995) p. 307.
J. B. Clark, Acta Metall. 16(1968) 141.
M. Frebel and K. Behler, Metall. Trans. A 8(1977) 621.
D. A. Porter and J. W. Edington, Proc. Roy. Soc. Lond. A 358(1977) 335.
D. Duly, Y. Brechet and B. Chenal, Acta Metall. 40 (1992) 2289.
D. Duly, M. C. Cheynet and Y. Brechet, ibid. 42 (1994) 3843.
T. B. Massalski(Editor-in-Chief), “Binary Alloy Phase Diagrams” (ASM International, Materials Park, Ohio, 1990) p. 70.
E. P. Butler and P.R. Swann, in “Physical Aspects of Electron Microscopy and Microbeam Analysis,” edited by B. Siegel and D. R. Beaman (Wiley, New York, 1975) p. 129.
J. Petermann and E. Hornbogen, Z. Metallk. 59(1968) 814.
K. L¨uck, ibid. 52(1961) 1.
G. V. Raynor, Proc. Roy. Soc. A 17 (1940) 457; 180(1940) 107.
D. Duly, M. C. Cheynet and Y. Brechet, Acta Metall. 42 (1994) 3855.
R. T. Dehoff and F. N. Rhines, “Quantitative Microscopy” (McGraw-Hill, New York, 1968) p. 461.
W. A. Johnson and R. F. Mehl, Trans. Amer. Inst. Min. Metall. Engrs. 135(1939) 416.
J. W. Christian, “The Theory of Transformations in Metals and Alloys,” 2nd ed., Part I (Pergamon Press, Oxford, 1975) p. 542.
M. S. Sulonen, Acta Metall. 8(1960) 669.
T. H. Chuang, R. Fournelle, W. Gust and B. Predel, Trans. Jap. Inst. Metals, Suppl. 27(1986) 609.
D. L¨udecke and K. Hack, Z. Metallk. 7(1986) 145.
D. Bradai, P. Zie¸ba, W. Gust and M. Kadi-Hanifi, Practical Metallography 35(1998) 673.
B. Predel and M. Frebel, Arch. Eisenh¨uttenwes. 43(1972) 839.
R. G. Speich, Trans. Metall. Soc. AIME 242(1968) 1359.
D. Turnbull, Acta Metall. 3(1955) 55.
B. E. Sundquist, Metall. Trans. A 4(1973) 1919.
J. W. Cahn, Acta Metall. 18(1959) 7.
G. Moreau, J. A. Cornet and D. Calais, J. Nucl. Mater. 38 (1971) 197.
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Bradai, D., Kadi-Hanifi, M., Zięba, P. et al. The kinetics of the discontinuous precipitation and dissolution in Mg-rich Al alloys. Journal of Materials Science 34, 5331–5336 (1999). https://doi.org/10.1023/A:1004753122411
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DOI: https://doi.org/10.1023/A:1004753122411