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TECHNICAL PAPERS: Gas Turbines: Manufacturing Materials and Metallurgy, and Marine

Dwell Sensitive Fatigue Response of Titanium Alloys for Power Plant Applications

[+] Author and Article Information
M. R. Bache, W. J. Evans

I.R.C. in Computer Aided Materials Engineering, Department of Materials Engineering, University of Wales, Swansea SA2 8PP, UKe-mail: irc@Swansea.ac.uk

J. Eng. Gas Turbines Power 125(1), 241-245 (Dec 27, 2002) (5 pages) doi:10.1115/1.1494094 History: Received December 01, 2000; Revised March 01, 2001; Online December 27, 2002
Copyright © 2003 by ASME
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References

Allen, P. G., Bania, P. J., Hutt, A. J., and Combres, Y., 1996, “LCB: A Low Cost Beta Alloy for Automotive and Other Industrial Applications,” Titanium ’95, P. A. Blenkinsop, W. J. Evans and H. M. Flower, eds., Eighth World Conference on Titanium, Birmingham, Oct. IOM, London, pp. 1680–1687.
Ruffles, P., 1995, “The Foresight Challenge,” Materials World, 3 , IOM, London, pp. 469–470.
Wojcik,  C. C., Khan,  K. S., and Koss,  D. A., 1988, “Stage I Fatigue Crack Propagation in a Titanium Alloy,” Acta Metall., 36, p. 1261.
Evans,  W. J., 1987, “The Influence of Microstructure on Dwell Sensitive Fatigue in a Near Alpha Titanium Alloy,” Scr. Metall., 21, p. 469.
Evans,  W. J., and Bache,  M. R., 1994, “Dwell Sensitive Fatigue Under Biaxial Loads in the Near-Alpha Titanium Alloy IMI685, ” Int. J. Fatigue, 16, pp. 443–452.
Bache,  M. R., and Evans,  W. J., 1992, “Tension and Torsion Fatigue Testing of a Near-Alpha Titanium Alloy,” Int. J. Fatigue, 14, p. 331.
Bache,  M. R., Cope,  M., Davies,  H. M., Evans,  W. J., and Harrison,  G., 1997, “Dwell Sensitive Fatigue in a Near Alpha Titanium Alloy at Ambient Temperature,” Int. J. Fatigue,19(1), pp. S83–S88.
Spence, S. H., Evans, W. J., and Cope, M., “Dwell Fatigue of Ti6246 at Near Ambient Temperatures,” Advances in Fracture Research, Proceedings of ICF9, Sydney, Australia, p. 1571.
Bache, M. R., Davies, H. M., and Evans, W. J., 1995, “A Model for Fatigue Crack Initiation in Titanium Alloys,” Titanium ’95, Proceedings of the 8th World Conference on Titanium, Birmingham, UK, P. A. Blenkinsop, W. J. Evans, and H. M. Flower eds., Institute of Materials, London, p. 1347.

Figures

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Titanium alloy microstructures, (a) mill annealed Ti 6/4, (b) bimodal Ti 6/4, (c) basket weave, Timetal 685, (d) aligned, Timetal 685, (e) rolled bar, Timetal 834, (f) forged disk, Timetal 834
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Slip band model to describe facet formation in alpha-beta and near-alpha titanium alloys under tension and torsion loading configurations
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Comparison of strain accumulation for Timetal 685 in basket weave and aligned microstructural form
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Strain accumulation under cyclic and dwell waveforms in basket weave Timetal 685
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Strain accumulation under cyclic tension and torsion loading in basket weave Timetal 685
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Cyclic and dwell fatigue response in Timetal 685
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Strain accumulation in basket weave and aligned forms of Timetal 685 at near equivalent normalized strength conditions (basket weave UTS=1067 MPA, aligned UTS=976 MPa)

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