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Small-Scale Morphological Features on a Solid Surface Processed by High-Pressure Abrasive Water Jet
School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China
* Author to whom correspondence should be addressed.
Received: 27 May 2013; in revised form: 29 July 2013 / Accepted: 7 August 2013 / Published: 14 August 2013
Abstract: Being subjected to a high-pressure abrasive water jet, solid samples will experience an essential variation of both internal stress and physical characteristics, which is closely associated with the kinetic energy attached to the abrasive particles involved in the jet stream. Here, experiments were performed, with particular emphasis being placed on the kinetic energy attenuation and turbulent features in the jet stream. At jet pressure of 260 MPa, mean velocity and root-mean-square (RMS) velocity on two jet-stream sections were acquired by utilizing the phase Doppler anemometry (PDA) technique. A jet-cutting experiment was then carried out with Al-Mg alloy samples being cut by an abrasive water jet. Morphological features and roughness on the cut surface were quantitatively examined through scanning electron microscopy (SEM) and optical profiling techniques. The results indicate that the high-pressure water jet is characterized by remarkably high mean flow velocities and distinct velocity fluctuations. Those irregular pits and grooves on the cut surfaces indicate both the energy attenuation and the development of radial velocity components in the jet stream. When the sample is positioned with different distances from the nozzle outlet, the obtained quantitative surface roughness varies accordingly. A descriptive model highlighting the behaviors of abrasive particles in jet-cutting process is established in light of the experimental results and correlation analysis.
Keywords: high-pressure water jet; abrasive particle; turbulent flow; jet-cutting experiment; morphological feature; surface roughness
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Cite This Article
MDPI and ACS Style
Kang, C.; Liu, H. Small-Scale Morphological Features on a Solid Surface Processed by High-Pressure Abrasive Water Jet. Materials 2013, 6, 3514-3529.
Kang C, Liu H. Small-Scale Morphological Features on a Solid Surface Processed by High-Pressure Abrasive Water Jet. Materials. 2013; 6(8):3514-3529.
Kang, Can; Liu, Haixia. 2013. "Small-Scale Morphological Features on a Solid Surface Processed by High-Pressure Abrasive Water Jet." Materials 6, no. 8: 3514-3529.