Variation in acoustic nonlinearity has been monitored in real time during fatigue, on four dogbone specimens of Ti-6A1-4V, under low cycle fatigue conditions, from the virgin state all the way to fracture. The results of these experiments show that the acoustic nonlinearity undergoes large changes during the fatigue and follows a similar trend for the material under given fatigue test conditions. Transmission electron microscopic (TEM) examination of the samples with similar composition fatigued to different stages indicates a gradual change in the microstructure and dislocation density, which correlates with the changes in acoustic nonlinearity.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
J. K. Na, J. H. Cantrell and W. T. Yost, in Review of Progress in Quantitative Nondestructive Evaluation, edited by D. O. Thompson and D. E. Chimenti (Plenum, New York, 1996), Vol. 15, pp. 1347–1352.
J. H. Cantrell and W. T. Yost, Phil. Mag. A 69, 315 (1994).
J. Frouin, S. Sathish, T. E. Matikas and J. K. Na, J. Mater. Res. 14, 4 (1999).
J. Philip, M. A. Breazeale, Physical Acoustics, Vol. XVII, edited by W. P. Mason (Academic Press, New York, 1981), p. 1.
J. Frouin, S. Sathish, T. E. Matikas, J. K. Na, In-situ monitoring of acoustic linear and nonlinear behavior of titanium alloys during cycling loading, SPIE’s Proceedings on Nondestructive Evaluation of Aging Materials and Composites, March 1999.
J.L. Maurer, J. Frouin, S. Sathish, T. Matikas, and D. Eylon, Internal Damage Characterization of Cyclically Loaded Ti-6Al-4V, Using TEM and Nonlinear Acoustics, Proceedings of the 9th Titanium World Conference, St. Petersburg, Russia, June 1999, In Print.
The authors acknowledge Mr. Tim Campbell, Mr. Ed. Klosterman and Mr. Marc Ruddell for their assistance in the experimental measurements. This research was sponsored by the Defense Advanced Project Agency (DARPA) Multidisciplinary University Research Initiative (MURI), under Air Force Office of Scientific Research Grant No. F49620-96-1-0442.
About this article
Cite this article
Frouin, J., Maurer, J., Sathish, S. et al. Real-Time Monitoring of Acoustic Linear and Nonlinear Behavior of Titanium Alloys During Cyclic Loading. MRS Online Proceedings Library 591, 91–96 (1999). https://doi.org/10.1557/PROC-591-79