Abstract
Ambient-temperature, low-cycle dwell-time and conventional low-cycle fatigue tests were performed on Ti-6Al-2Sn-4Zr-2Mo-0.1Si (Ti-6242). Specimens were solution annealed at various temperatures below the beta transus to control the volume fraction of primary alpha phase and were subsequently shot-peened. The influence of the changes in primary alpha phase on the low-cycle dwell-time fatigue life (LCDF) were determined and compared to the conventional low-cycle fatigue (LCF) properties of the alloy. A 120-second dwell significantly decreased the number of cycles to failure, although the factor decrease of LCF from a dwell, in general, diminished with decreasing stress. The Increasing primary alpha phase associated with lower solution temperatures appears to increase susceptibility to low-cycle dwell-time fatigue. It also appears that the susceptibility to dwell fatigue may be associated with ambient-temperature, time-dependent, cyclic (creep) plasticity.
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W.J. Evans and C.R. Gostelow: Metall. Trans., A 1979, vol. 10A, pp. 1837–46.
W.J. Evans: J. Mater. Sci. Lett., 1987, vol. 6, pp. 571–74.
D. Eylon and J.A. Hall: Metall. Trans., A 1977, vol. 8A, pp. 981–90.
A.P. Woodfield, M.D. Gorman, R.R. Corderman, J.A. Sutliff, and B. Yamrom: Titanium ’95 Science and Technology, C.A. Blenkinsop, W.J. Evans, and H.M. Flower, eds., Institute of Materials, Cambridge University Press, Cambridge, United Kingdom, 1996, pp. 1116–23.
J.E. Hack and G.R. Leverant: Metall. Trans., A 1982, vol. 13A, pp. 1729–38.
W.J. Evans: 2nd Int. Conf. on Creep and Fracture of Engineering Materials and Structures, Swansea, 1984, B. Wilshire, ed., Pineridge, Swansea, United Kingdom, 1984, p. 395.
W.J. Evans and M.R. Bache: Fatigue, 1994, vol. 16, pp. 443–53.
W.J. Evans: Strength of Metals and Alloys, Pergamon, Oxford, United Kingdom, 1998, pp. 659–64.
U. Kansal and M.E. Kassner: J. Mater. Eng. Perf., 1992, vol. 1, pp. 393–98.
Metals Handbook, 9th ed., ASM, Materials Park, 1982, vol. 5, pp. 138–49.
K.E. Thiehsen, M.E. Kassner, J. Pollard, D.R. Hiatt, and B. Bristow: Metall. Trans., A 1993, vol. 24A, pp. 1819–26.
S. Suri, G.B. Viswanathan, T. Neeraj, D.-H. Hou, and M.J. Mills: Acta Mater., 1999, vol. 14, pp. 1019–34.
H.P. Chu, B.A. MacDonald, and O.P. Arora: Titanium Sci. Technol., vol. 4; G. Lutjering, U. Zwicker, and W. Bunk: Proc. 5th Int. Conf. on Titanium, Duetsche Gesellechat fur Metallkunde, E.V., Oberursel, 1984, p. 2395.
S. Suresh: Fatigue of Materials, Cambridge University Press, Cambridge, United Kingdom, 1991.
D.F. Neal: Titanium Science and Technology, Proc. 6th World Conf. on Titanium, Cedex, France, 1988, P. Lacombe, R. Tricot, and G. Beronger, eds., Les Editions de Physique, Paris, 1988, pp. 175–80.
J.A. Hall: Int. J. Fatigue, 1998, vol. 19, pp. S23-S37.
Titanium Alloys, R. Boyer, C. Welsch, and E.W. Coilings, eds., ASM INTERNATIONAL, Materials Park, OH, 1994, p. 362.
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Kassner, M.E., Kosaka, Y. & Hall, J.S. Low-cycle dwell-time fatigue in Ti-6242. Metall Mater Trans A 30, 2383–2389 (1999). https://doi.org/10.1007/s11661-999-0246-y
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DOI: https://doi.org/10.1007/s11661-999-0246-y