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TECHNICAL PAPERS

Fatigue Performance of High-Pressure Waterjet-Peened Aluminum Alloy

[+] Author and Article Information
M. Ramulu, S. Kunaporn, M. Jenkins

Department of Mechanical Engineering, University of Washington, Seattle, WA 98195

M. Hashish, J. Hopkins

Flow International Corporation, Kent, WA 98032

J. Pressure Vessel Technol 124(1), 118-123 (May 22, 2001) (6 pages) doi:10.1115/1.1398553 History: Received January 14, 2001; Revised May 22, 2001
Copyright © 2002 by ASME
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References

Zafred, P. R., 1990, “High Pressure Water Shot Peening,” European Patent Specification, Publ. No. EP 0218354B1, November 7.
Niku-Lari, A., 1981, “Shot Peening,” First International Conference on Shot Peening, Paris, France, September 14–17, Pergamon Press Ltd., pp. 1–21.
Marsh, K.,J., 1993, Shot Peening: Techniques and Applications, Engineering Material Advisory Services Ltd., London, UK.
De los Rios,  E.,R., Walley,  A., Milan,  M.,T., and Hammersley,  G., 1995, “Fatigue Crack Initiation and Propagation on Shot-Peened Surfaces in A316 Stainless Steel” Int. J. Fatigue, 17, No. 7, pp. 493–499.
Hammond,  D.,W., and Meguid,  S.,A., 1990, “Crack Propagation in the Presence of Shot-Peening Residual Stresses,” Eng. Fract. Mech., 37, No. 2, pp. 373–387.
Was, G.,S., Pelloux, R.,M., and Frabolot, M.,C., 1981, “Effect of Shot Peening Methods on The Fatigue Behavior of Alloy 7075-T6,” First International Conference on Shot Peening, Paris, France, September 14–17, Pergamon Press Ltd., pp. 445–451.
Luo, W., Noble, B., and Waterhouse, R.,B., 1986, “The Interaction Between Shot-Peening and Heat Treatment on the Fatigue and Fretting-Fatigue Properties of the High Strength Aluminum Alloy 7075,” Impact Surface Treatment, Elsevier Applied Science Publishers, pp. 57–67.
Oshida, Y., and Daly, J., 1986, “Fatigue Damage Evaluation of Shot Peened High Strength Aluminum Alloy,” 2nd International Conference in Impact Surface Treatment, September 22–26, Elsevier Applied Science Publishers, London, UK, pp. 404–416.
Al-Obaid,  Y.,F., 1990, “A Rudimentary Analysis of Improving Fatigue Life of Metals by Shot Peening,” J. Appl. Mech., 57, pp. 307–312.
Blickwedel, H., Haferkamp, H., Louis, H. and Tai, P.,T., 1987, “Modification of Material Structure by Cavitation and Liquid Impact and Their Influence on Mechanical Properties,” Erosion by Liquid and Solid Impact, Proc. 7th International Conference on Erosion by Liquid and Solid Impact, September 7–10, pp. 31.1–31.6.
Tonshoff,  H.,K., Kross,  F., and Marzenell,  C., 1997, “High-pressure water Peening—A New Mechanical Surface-Strengthening Process,” Annuals of the CIRP, 46, No. 1, pp. 113–116.
Yamauchi,  Y., Soyama,  H., Adashi,  Y., Sato,  K., Shindo,  T., Oba,  R., Oshima,  R., and Yamabe,  M., 1995, “Suitable Region of High-Speed Submerged Water Jets for Cutting and Peening,” JSME Int. J., Ser. B, 8, No. 1, pp. 31–38.
Daniewicz,  S. R., and Cummings,  S. D., 1999, “Characterization of Water Peening Process,” ASME J. Eng. Mater. Technol., 121, pp. 336–340.
Mathias,  M., Gocke,  A., and Pohl,  M., 1991, “The Residual Stress, Texture and Surface Changes in Steel Induced by Cavitaion,” Wear, 150, pp. 11–20.
Ramulu,  M., Kunaporn,  S., Arola,  D., Hashish,  M., and Hopkins,  J., 2000, “Waterjet Machining and Peening of Metals,” ASME J. Pressure Vessel Technol., 122, pp. 90–95.
Ramulu, M., Kunaporn, S., Jenkins, M., Hashish, M., and Hopkins, J., 1999, “Peening with High Pressure Waterjets” SAE T. P. Series No. 1999-01-2285. Aerospace Manufacturing Technology Conference and Exposition, Bellevue, WA, June 8–10.
Ramulu, M., Kunaporn, S., Jenkins, M., Hashish, M., and Hopkins, J., “Erosion Characteristics of 7075-T6 Aluminum alloy by Waterjet Peening,” to be published.
“Fatigue and Fracture,” ASM Handbook, 1996, ASM International, OH, Vol. 19, pp. 785–800.
Standard Test Method for Measurement of Fatigue Crack Growth Rates, ASTM E647, Annual Book of ASTM Standards, Metals test Methods and Analytical Procedures, ASTM Publication, PA.

Figures

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Geometry and dimensions of hourglass, circular cross section fatigue life test specimens
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Geometry and dimensions of single-edge-notched fatigue crack growth tensile test specimen
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Waterjet peening operation
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Fatigue crack extension versus number of cycles for unpeened and waterjet-peened single-edge-notched tensile test specimens
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Fatigue crack growth curves (da/dN versus ΔK) for unpeened and waterjet-peened single-edge-notched tensile test specimens
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S-N curves for as-machined and waterjet-peened circular cross section fatigue life test specimens tested in completed reversed rotating bending (7075-T6 aluminum alloy)—(a) P=103 MPa,t=15.5 s; (b) P=207 MPa,t=15.5 s; and (c) P=310 MPa,t=15.5 s
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S-N curves for as-machined and waterjet-peened circular cross section fatigue life test specimens tested in completed reversed rotating bending (7075-T6 aluminum alloy, P=310 MPa)
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SEM fractography of (a), (b) unpeened test specimen, and (c), (d) waterjet-peened fatigue test specimen (mean stress=250 MPa)  

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