Experimental analysis of oil based cavitation peening in air

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1853/43602

Title: Experimental analysis of oil based cavitation peening in air
Author: Marsh, Richard
Abstract: Oil Jet Cavitation Peening in Air (OPA) is capable of inducing compressive residual stress in standard aerospace materials. This paper demonstrates the process capabilities of OPA on Al 2024-T3. Specifically, changes in the workpiece residual stress, microhardness, mass loss and surface roughness are investigated as a function of the control parameters for the system. Additionally, the paper identifies a method to monitor the process in situ through the use of high frequency acoustic emission sensors. The results indicate the OPA process is capable of generating residual stresses comparable to those of standard shot peening, up to 60% of the yield strength of the material, at similar depths, around 300 µm. Finally, the acoustic emission signal may be utilized to monitor the process, specifically in predicting the microhardness and mass loss of the system.
Type: Thesis
URI: http://hdl.handle.net/1853/43602
Date: 2011-01-21
Publisher: Georgia Institute of Technology
Subject: Cavitation jet peening
Hydraulic fluid
Acoustic emission
Surface roughness
Residual stress
Shot peening
Water jet peening
Surface hardening
Cavitation erosion
Department: Mechanical Engineering
Advisor: Committee Chair: Melkote, Shreyes; Committee Member: Danyluk, Steven; Committee Member: Yoda, Minami
Degree: MS

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