Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-29T07:39:32.322Z Has data issue: false hasContentIssue false
  • English
  • Français

An Investigation of The Effects of Temperature on Fatigue Crack Growth Behavior of a Cast Nearly Lamellar Ti-47A1–2Cr-2Mn + 0.8 Vol. %TiB2 Gamma Titanium Alloy

Published online by Cambridge University Press:  21 March 2011

J. Lou ,
C. Mercer  and
W.O. Soboyejo
J. Lou
Affiliation:
The Princeton Materials Institute and The Department of Mechanical and Aerospace Engineering, Princeton University, Olden Street, Princeton, NJ 08544
C. Mercer
Affiliation:
The Princeton Materials Institute and The Department of Mechanical and Aerospace Engineering, Princeton University, Olden Street, Princeton, NJ 08544
W.O. Soboyejo
Affiliation:
The Princeton Materials Institute and The Department of Mechanical and Aerospace Engineering, Princeton University, Olden Street, Princeton, NJ 08544
Get access

Abstract

This paper presents the results of a study of the effects of temperature on fatigue crack growth in Ti-47A1–2Cr-2Mn + 0.8 Vol. %TiB2 gamma titanium aluminide intermetallics. Fatigue crack growth rate data are presented for the cast lamellar microstructure at 25,450 and 750°C. The trends in the fatigue crack growth rate data are explained by considering the combined effects of crack-tip deformation mechanisms and oxide-induced crack closure. Faster fatigue crack growth rates at 450°C are attributed to the high incidence of irreversible deformation-induced twinning, while slower crack growth rates at 700°C are due to increased deformation by slip and the effects of crack-tip shielding provided by oxide-induced wedging, which is analyzed using a modified Dugdale-Barenblatt model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 646 , 2000 , N1.7.1
Copyright
Copyright © Materials Research Society 2001

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Christodoulou, L., Parrish, P.A. and Crowe, C.R., High Temperature/High Performance Composites, eds. Lemkey, F.D. et al. (Pittsburgh, PA: MRS, 1988), 29–34.Google Scholar
2. Kim, Y-W. and Dimiduk, D.M., Journal of Metals, 43 (1991), 40–47.Google Scholar
3. Mercer, C. and Soboyejo, W.O., Acta Mater., 45 (10) (1997), 4385–96, 1997.Google Scholar
4. Kim, Y-W., Journal of Metals, 46 (1994), 30–39.Google Scholar
5. Campbell, J.P., Venkateswara Rao, K.T. and Ritchie, R.O., Proceedings of the Sixth International Congress on Fatigue, ed. Lüterjing, G. and Nowack, J., (Oxford, U.K. : Pergamon Press, vol III, 1996), 1779–84.Google Scholar
6. Mckelvey, A.L. et. al., Proceedings of the Sixth International Congress on Fatigue, ed. Lüterjing, G. and Nowack, J., (Oxford, U.K.: Pergamon Press, Vol. III, 1996), 1743–78.Google Scholar
7. Suresh, S. and Ritchie, R.O., Int. Metals Rev., 29 (1984), 445.Google Scholar
8. Chan, K.S., Metall. Trans., 22A (1991), 2021–29.Google Scholar
9. Larsen, D.E. Jr and Behrendt, M., Proceedings of The Symposium on Fatigue and Fracture of Ordered Intermetallic Materials I, ed. Soboyejo, W.O., Srivatsan, T.S. and Davidson, D.L. (Warrendale, PA: The Minerals, Metals & Materials Society, 1993), 27–37.Google Scholar
10. Suresh, S. and Brockenbrough, J.R., Acta Metall, 36 (1988), 1444–70.Google Scholar
11. Soboyejo, W.O., Deffeyes, J.E. and Aswath, P.B., Materials Science and Engineering, A138 (1991), 95–101.Google Scholar
12. Aswath, P. B., Soboyejo, W. O. and Suresh, S., in FATIGUE ‘90, Proceedings of an International Conference on Fatigue, 1990, Kitagawa, H. and Tanaka, T., Editors, EMAS, Warley, U. K., pp. 1941–46.Google Scholar
13. McKelvey, A. L., Venkateswara Rao, K. T. and Ritchie, R. O., Scripta Mater., 37 (1997), pp. 1797–1803.Google Scholar