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TECHNICAL PAPERS

Effects of Shot-Peening on Fretting-Fatigue Behavior of Ti-6Al-4V

[+] Author and Article Information
S. A. Namjoshi

Department of Aeronautics and Astronautics, Air Force Institute of Technology (AFIT/ENY), Building 640, 2950 P Street, Wright-Patterson Air Force Base, OH 45433-7765

V. K. Jain

Mechanical and Aerospace Engineering Department, University of Dayton, Dayton, OH 45469-0210

S. Mall

Materials and Manufacturing Directorate (AFRL/MLLN), Air Force Research Laboratory, Wright Patterson AFB, OH 45433-7817

J. Eng. Mater. Technol 124(2), 222-228 (Mar 26, 2002) (7 pages) doi:10.1115/1.1448323 History: Received February 07, 2001; Revised October 25, 2001; Online March 26, 2002
Copyright © 2002 by ASME
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References

Hoeppner, D. W., Chandrasekaran, V., and Elliot, C. B., eds., 2000, “Fretting-Fatigue: Current Technologies and Practices,” ASTM STP 1367, American Society for Testing and Materials, Philadelphia.
Hoeppner,  D., and Goss,  G., 1974, “A Fretting-fatigue Damage Threshold Concept,” Wear, 27, pp. 61–70.
Rayaproula, D., and Cook, R., 1992, “A Critical Review of Fretting-fatigue Investigations at the Royal Aerospace Establishment,” Standardization of Fretting-fatigue Test Methods and Equipment, ASTM STP 1159, M. Helmi and R. Waterhouse, eds. American Society for Testing and Materials, Philadelphia, pp. 129–152.
Waterhouse,  R., 1992, “Fretting-Fatigue,” Int. Mater. Rev., 37, No. 2, pp. 77–97.
Lykins,  C. D., Mall,  S., and Jain,  V. K., 2000, “An Evaluation of Parameters for Predicting Fretting-fatigue Crack Initiation,” Int. J. Fatigue, 22, pp. 703–716.
Waterhouse, R. B., 1981, “Avoidance of Fretting Fatigue Failures,” Fretting Fatigue, Applied Science Publishers, London, pp. 221–240.
Leadbeater, G., Noble, B., and Waterhouse, R. B., 1984, “The Fatigue of an Aluminum Alloy Produced by Fretting on Shot Peened Surfaces,” Proceedings of 6th Int. Conf. on Fracture, India, Vol. 3, pp. 2125–2132.
Gabel,  M. K., and Bethk,  J. J., 1979, “Coatings for Fretting Prevention,” Wear, 46, pp. 81–96.
Vardiman, R. G., Creighton, D., et al., 1982, “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.
Tanaka,  K., Mutoh,  Y., and Sakoda,  S., 1985, “Effect of Contact Materials on Fretting Fatigue in a Spring Steel,” Trans. Jpn. Soc. Mech. Eng., Ser. A, 51, No. 464, pp. 1200–1207.
De Los Rios, E. R., Brown, M. W., et al., 1999, “Effect of Shot-Peening on the Fretting Fatigue Behavior of BS L65 Aluminum Alloy,” International Committee on Aeronautical Fatigue, 25’th Conference, Seattle WA.
De Los Rios, E. R., Trooll, M., and Levers, A., 1999, “Improving the Fatigue Crack Resistance of 2024-T351 Aluminum Alloy by Shot Peening,” Life Extension-Aerospace Technology Opportunities, The Royal Aeronautical Society Publication, pp. 26.1–26.8.
Mutoh, Y., Satoh, T., and Tsunoda, E., 1992, “Improving Fretting Fatigue Strength at Elevated Temperatures by Shot-Peening in Steam Turbine Steel,” Standardization of Fretting Fatigue Test Methods and Equipment, ASTM STP 1159, M. Helmi Attia and R. B. Waterhouse, eds., American Society for Testing and Materials Philadelphia, pp. 199–209.
Cortez, R., Mall, S., and Calcaterra, J. R., 2000, “Interaction of High-Cycle and Low-Cycle Fatigue on Fretting-fatigue Behavior of Ti-6AL-4V,” Fretting-Fatigue: Current Technology and Practices, ASTM STP 1367, D. W. Hoeppner, V. Chandrasekaran, and C. B. Elliot, eds. American Society for Testing and Materials, West Conshohocken, PA, pp. 183–198.
Iyer,  K., and Mall,  S., 2000, “Effects of Cycling Frequency and Contact Pressure on Fretting Fatigue under Two-Level Block Loading,” Fatigue Fract. Eng. Mater. Struct., 23, pp. 335–346.
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Lykins,  C. D., Mall,  S., and Jain,  V. K., 2001, “A Shear Based Parameter for Fretting-fatigue Crack Initiation,” Fatigue Fract. Eng. Mater. Struct., 24, pp. 461–473.
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Walker, K., 1970, “The Effect of Stress Ratio During Crack Propagation and Fatigue for 2024-T3 and 7075-T6 Aluminum,” Effects of Environment and Complex Load History on Fatigue Life, ASTM STP 462, American Society for Testing and Materials, West Conshohocken, PA, pp. 1–14.
Namjoshi, S. A., Mall, S., Jain, V. K., and Jin, O., “Fretting Fatigue Crack Initiation Mechanism in Ti-6Al-4V, ” submitted for publication.

Figures

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Schematic of fretting test frame, fretting specimen and pads
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Variation of σxx with x/a in the top layer of fretting fatigue specimen. Loading conditions: axial stress=547 MPa;Q=158 N;P=1335 N; coefficient of friction=0.33
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Plot of compressive residual stress produced by shot-peening as function of the specimen depth
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Variation of experimentally determined residual compressive stress due to shot-peening and the compensatory tensile stress as obtained by curve fitting
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Experimental fatigue life data versus applied stress range and numerical fits to this data for as-received (fretting-fatigue), shot-peened (fretting-fatigue), and as-received plain-fatigue specimen
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Schematic of gage section of dogbone specimen showing fracture surface(s) and fretting scar on a failed specimen
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Scanning electron micrograph of fracture surface of specimen #25 from Table 1 (loading condition same as in Fig. 3)
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SEM micrograph of the fracture surface showing presence of striations on the fracture surface (loading condition same as in Fig. 3)
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Optical micrograph of fretting scar on specimen surface showing crack initiation site (loading condition same as in Fig. 3)
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Plot of σeffective versus fatigue life for as-received (fretting-fatigue), shot-peened (fretting-fatigue) and as-received (plain-fatigue) specimens
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Plot of σeffective versus fatigue life for shot-peened (fretting-fatigue) with consideration of residual tensile stress and as-received (plain-fatigue) specimens

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