A new surface modification process was developed to introduce compressive residual stresses at the surface of components. In this process, instead of oil droplets a high-velocity cavitation jet (cloud of oil bubbles) impinges on the surface of the component to be peened. The impact pressure generated during implosion of cavitation bubbles causes severe plastic deformation at the surface. Consequently, beneficial compressive stresses are developed at the surface. In order to find the potential of this process, aluminum alloy AA6063-T6 specimens were peened at a constant cavitation number with various nozzle-traveling velocities. Residual stress induced by oil jet cavitation peening was measured using X-ray diffraction. Oil cavitation jet peening results in a smooth and hard surface. The developed compressive residual stresses at the peened surface are about 52%, 42%, and 35% of yield strength in samples for peened at nozzle traveling velocities of , , and , respectively.
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October 2007
Technical Papers
Effect of Nozzle-Traveling Velocity on Oil Cavitation Jet Peening of Aluminum Alloy, AA 6063-T6
A. Sahaya Grinspan,
A. Sahaya Grinspan
Department of Mechanical Engineering,
Indian Institute of Technology Madras
, Chennai — 600 036, India
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R. Gnanamoorthy
R. Gnanamoorthy
Department of Mechanical Engineering,
e-mail: gmoorthy@iitm.ac.in
Indian Institute of Technology Madras
, Chennai — 600 036, India
Search for other works by this author on:
A. Sahaya Grinspan
Department of Mechanical Engineering,
Indian Institute of Technology Madras
, Chennai — 600 036, India
R. Gnanamoorthy
Department of Mechanical Engineering,
Indian Institute of Technology Madras
, Chennai — 600 036, Indiae-mail: gmoorthy@iitm.ac.in
J. Eng. Mater. Technol. Oct 2007, 129(4): 609-613 (5 pages)
Published Online: July 2, 2007
Article history
Received:
December 25, 2006
Revised:
July 2, 2007
Citation
Grinspan, A. S., and Gnanamoorthy, R. (July 2, 2007). "Effect of Nozzle-Traveling Velocity on Oil Cavitation Jet Peening of Aluminum Alloy, AA 6063-T6." ASME. J. Eng. Mater. Technol. October 2007; 129(4): 609–613. https://doi.org/10.1115/1.2772339
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