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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

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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