Bainite formation in a silver-cadmium alloy
Tóm tắt
The changes in X-ray diffraction intensity and internal friction within and beyond the incubation period of bainitic transformation on the isothermal TTT diagram in a silver-cadmium (43.3 wt pct Cd) alloy were studied. Experimental results show that the parent-phase X-ray diffraction intensity and the internal friction value increase immediately at the beginning of isothermal holding and that the internal friction reaches its maximum value,Q
−1
max within the incubation period. It then gradually decreases. It is suggested that the prebainitic transformation within the incubation period is the nucleation process of bainite.
Tài liệu tham khảo
D.B. Masson and C.S. Barrett:Trans. Am. Inst. Min. Eng., 1958, vol. 212, pp. 260–65.
M.M. Kostic, E.B. Hawbolt, and L.C. Brown:Metall. Trans. A, 1976, vol. 7A, pp. 1643–53.
Z. Bojarski and T. Bold:Acta Metall., 1974, vol. 22, pp. 1223–27.
N.A. Zoidze,N.N. Luarabishvili, V.l. Badzoshvili, V.Sh. Metrevili, F.N. Tavadze, and R.K. Zekalashvili:Internal Friction in Metals and Inorganic Materials, Science Press, Moscow, 1982, pp. 106–09.
T. Tadaki, T. Ueda, and K. Shimizu:Abstract in Final Program Int. Conf. of Bainite, World Materials Congress, Sept. 26, 1988, Chicago, IL, ASM INTERNATIONAL, p. 43.
J. Van Humbeeck and L. Delaey:J. de Physique, Conf. C-4, 1982, vol. 43 (12), pp. 691–95.
P.C. Clapp:Phys. Stat. Sol. (b), 1973, vol. 57, pp. 561–64.
J.W. Christian:The Theory of Transformations in Metals and Alloys, Pergamon Press, London, 1965, ch. 10, p. 403.