EFFECTS OF SHOT-PEENING ON HIGH CYCLE FRETTING FATIGUE BEHAVIOR OF Ti-6Al-4V
Keywords:
Fretting Fatigue, High Cycle Fatigue, Shot-PeeningAbstract
Effects of shot peening on High Cycle Fretting Fatigue behavior of Ti-6Al-4V were investigated. Experiments
were performed with 6.35 mm thick specimens which provided S / N curves. After the tests, it was observed that
the specimens failed near the trailing edge of contact. Scanning Electron Microscopy (SEM) showed that cracks
initiated on the contact surface for 6.35 mm, and at the depth of specimen ranging from 200 to 300 microns for
3.81 mm thick specimens. Initial crack orientation was around 37 and 42 degrees respectively for 6.35 and 3.81
mm thicknesses. Finite Element Analysis( FEA ) was conducted, and using FEA results, Smith-Watson-Topper,
Findley, Shear Stress Range and Modified Shear Stress Range parameters were evaluated. Stress relaxation was
observed after the failure of the specimens, and evaluations were repeated for different percentages of stress
relaxation. Based on specific assumptions about stress relaxation, Modified Shear Stress Range parameter was
determined to be the only appropriate fatigue parameter that could meet all the required conditions for shot
peened fretting fatigue specimens. Also thickness effects on shot-peened specimens were investigated and
discussed in this study.
Downloads
References
Fatigue Failures”, Fretting Fatigue, Applied
Science Publishers, London, pp 221-240,
1981.
2. G. Leadbeater, B. Noble, and R. B.
Waterhouse, “The Fatigue of an Aluminum
Alloy Produced by Fretting on Shot-Peened
Surfaces”, Proceedings of 6 th Int. Con. On
Fracture, India, Vol. 3, pp 2125-2132, 1984.
3. M. K. Gabel, and J. J. Bethk, “Coatings for
Fretting Prevention”, Wear, Vol. 46, pp 81-
96, 1979.
4. R. G. Vardiman, D. Creighton, et al, “Effect
of Ion Implantation on Fretting Fatigue in Ti-
6Al-4V Alloy”, ASTM STP 780, American
Society for Testing and Materials,
Philadelphia, pp, 138-149, 1982.
5. K. Tanaka, Y. Mutoh, and S. Sakoda, “Effect
of Contact Materials on Fretting Fatigue in a
Spring Steel”, Transactions on Japan Soc.
Mech. Engrs (A), Vol 51, No. 464, pp 1200-
1207, 1985.
6. ABAQUS Standard User’s Manual Vol 2.,
Hibbit, Karlsson and Sorensen, Inc. 1995.
7. C. D. Lykins, “An Investigation of Fretting
Fatigue Crack Initiation Behavior on the
Titanium Alloy Ti-6Al-4V”, Dissertation.
8. C. Ruiz, P. Boddington and K. Chen, “An
Investigation of Fatigue and Fretting in a
Dovetail Joint”, Experimental Mechanics,
1984, Vol. 24, No. 3, 208-217.
9. C. D. Lykins, S. Mall, and V. K. Jain, “An
Evaluation of Parameters for Predicting
Fretting Fatigue Crack Initiation”,
International Journal of Fatigue, Vol. 22, pp
703-716, 2000.
10. K. Walker, “The Effect of Stress Relaxation
During Crack Propagation and Fatigue for
2024-T3 and 7075-T6 Aluminum”, Presented
to Subcommittee E-9V Winter Meeting, Feb
1969.
11. D. Socie, “Multiaxial Fatigue Damage
Models”, Journal of Engineering Materials
and Technology, Oct 1987 Vol. 109, 293-
298.
12. W. N. Findley, “Fatigue of Metals Under
Combinations of Stresses”, Transactions,
ASME, Vol. 79, pp. 1337-1348, 1957.
13. S. Mall, V. K. Jain, S. Namjoshi, C. D.
Lykins, “Fretting Fatigue Crack Initiation
Behavior of Ti-6Al-4V”. ( in press )
14. H. I. Yuksel, “Effetcts of Shot-Peening on
High Cycle Fretting Fatigue Behavior of Ti-
6Al-4V”, M.S. Thesis .
15. S. Namjoshi, V. K. Jain, S. Mall, “Effects of
Shot-peening on Fretting Fatigue Behavior of
Ti-6Al-4V”. (in press).
Downloads
Published
How to Cite
Issue
Section
License
The manuscript with title and authors is being submitted for publication in Journal of Aeronautics and Space Technologies. This article or a major portion of it was not published, not accepted and not submitted for publication elsewhere. If accepted for publication, I hereby grant the unlimited and all copyright privileges to Journal of Aeronautics and Space Technologies.
I declare that I am the responsible writer on behalf of all authors.
