INVESTIGATION OF CAVITATION DAMAGE PROGRESS IN THE INCUBATION PERIOD USING STEPWISE EROSION AND IMAGE PROCESS TECHNIQUES | ||
| JES. Journal of Engineering Sciences | ||
| Article 12, Volume 42, No 3, May and June 2014, Pages 683-702 PDF (521.58 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.21608/jesaun.2014.115022 | ||
| Authors | ||
| M. Osman1; S. M. Ahmed2 | ||
| 1Mechanical Eng. Depat. College of Engineering, Majmaah University, Saudi Arabia | ||
| 2Mechanical Engineering Department, Faculty of Engineering, Majmaah University ,Saudi Arabia | ||
| Abstract | ||
| Cavitation damage process of stainless steel during the incubation period was detected and evaluated using stepwise erosion technique and image processing. The damage experiments were conducted using the vibratory test rig. The scanning electron microscope images at different locations on eroded surface using stepwise technique were presented. In addition, the surface roughness was measured with the testing time. Discrete wavelet transforms and fractals had been adopted to extract the relevant features. It was found that the feature parameters: Shannon entropy, energy loss, fractal dimension and intercept show a fairly linear increase with the testing time. It was also observed that the feature parameters have reasonable correlations with the roughness parameters. | ||
| Keywords | ||
| Cavitation erosion; electron microscopy; surface analysis; stainless steel | ||
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