Experience With a 20-kc Cavitation Erosion Test

2009 ◽  
pp. 159-159-27 ◽  
Keyword(s):  
Cavitation Erosion ◽  
Erosion Test

Analysis of the External Conditions Affecting on the Cavitation Resistance of a Steel

2019 ◽  
Vol 946 ◽  
pp. 31-36
Author(s):  
Hussam L. Alwan ◽  
N. Lezhnin ◽  
Yury Korobov
Keyword(s):  
Surface Resistance ◽  
Cavitation Erosion ◽  
Medium Carbon Steel ◽  
Cavitation Resistance ◽  
Nacl Solution ◽  
Medium Carbon ◽  
Test Conditions ◽  
External Conditions ◽  
Erosion Test ◽  
Testing Liquid

The aim of this study is to analyze the effect of cavitation erosion test conditions on the surface resistance of medium carbon steel. The ultrasonic vibratory specimen system was used to perform the experiments under the laboratory conditions. The vibratory frequency and the displacement amplitude were 20 kHz and 20 μm, respectively. In design of experiments, four various cavitation behaviors have been studied based on four cavitation test conditions corresponding to those behaviors. These conditions can be summarized as follows: (1) the usage of water as a testing liquid; (2) replacement the water with 3.5% NaCl solution; (3) applying a certain voltage to cause a combined electrochemical action working simultaneously with the water; and (4) applying the same voltage by using the 3.5% NaCl solution instead of water. The obtained results showed that the mass loss differs by test modes applied.

The Cavitation Behavior of Fe-Cr-C-Si-Ni Alloys

2006 ◽  
Vol 510-511 ◽  
pp. 274-277
Author(s):  
Ji Hui Kim ◽  
Kwang Su Na ◽  
Seon Jin Kim
Keyword(s):  
Work Hardening ◽  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Hardfacing Alloy ◽  
Ni Alloys ◽  
Ni Addition ◽  
Work Hardening Rate ◽  
Erosion Test ◽  
Cavitation Behavior ◽  
Cavitation Erosion Resistance

The cavitation erosion behavior of Fe-Cr-C-Si-xNi (x = 1, 2 and 3 wt.%) alloys were investigated for 50 hours using a 20 kHz vibratory cavitation erosion test equipment. 1 wt.% Ni added Fe-based hardfacing alloy showed excellent cavitation erosion resistance, comparable to the stellite 6. Above 1 wt.% Ni, however, the erosion resistance deteriorated quickly. It is conjectured that Ni addition above 1 wt.%, which has been shown to increase the stacking fault energy (SFE), resulted in reduction of the work hardening rate during the erosion test. Therefore, the enhanced cavitation erosion resistance of the 1 wt.% Ni alloy over the 2 and 3 wt.% Ni alloys could be explained in terms of the SFE, Ms temperature and work hardening.

scholarly journals Comparison of cavitation erosion test results from venturi and vibratory facilities

Wear ◽  
1982 ◽  
Vol 76 (3) ◽  
pp. 269-292 ◽  
Author(s):  
Jiu-Gen He ◽  
F.G. Hammitt
Keyword(s):  
Cavitation Erosion ◽  
Test Results ◽  
Erosion Test

The Cavermod Device: Hydrodynamic Aspects and Erosion Tests

1999 ◽  
Vol 121 (2) ◽  
pp. 305-311 ◽  
Author(s):  
E. G. Filali ◽  
J. M. Michel
Keyword(s):  
Rotation Rate ◽  
Cavitation Erosion ◽  
Companion Paper ◽  
Core Collapse ◽  
Pure Aluminium ◽  
Force Measurements ◽  
Test Device ◽  
Erosion Model ◽  
Erosion Test

The Cavermod (CAVitation ERosion MODel) is an erosion test device first described by Dominguez-Cortazar et al. (1992, 1997). Recently, it was modified in two steps: first by increasing its maximum rotation rate (from 4500 to 8000 rpm) and second by shortening its vapor core (from 156 to 66 mm). This paper plans to present the main results which are obtained in both configurations (long and short vortex) and for “slow” or “rapid” regime of rotation. They mainly concern 1. the hydrodynamic aspects of the vapor core collapse, as deduced from observation of rapid films (evolution of the vortex length, collapse, velocity), 2. the erosion patterns produced on metallic targets such as pure aluminium and copper. A second companion paper will present the results of force measurements in both configuration and an attempt to estimate the local erosive pressures.

Bubble–bubble interaction effects on multiple bubbles dynamics in an ultrasonic cavitation field

2019 ◽  
Vol 234 (7) ◽  
pp. 1051-1060
Author(s):  
Feng Cheng ◽  
Weixi Ji ◽  
Junhua Zhao
Keyword(s):  
Cavitation Erosion ◽  
Threshold Value ◽  
Ultrasonic Field ◽  
Pressure Amplitude ◽  
Cavitation Field ◽  
Bubble Interaction ◽  
Erosion Test ◽  
Multiple Bubbles ◽  
Optimal Coupling ◽  
Material Fracture

A vibratory erosion test rig is used to study the cavitation erosion of 6061 alloy. Some craters and material fracture are found on the specimen surface at the beginning of test. A cavitation model in an ultrasonic field is developed by applying the bubble–bubble interaction effect into Keller–Miksis equation to obtain the bubbles dynamic characteristics. The results reveal that the bubble cloud configuration is suitable for the explanation of cavitation erosion, and the erosion surfaces of the specimen were subjected to the effect of both massive bubbles collapsing, occurring in the thin liquid layer between the horn and the specimen. It is concluded that the optimal coupling strength of bubbles increases with the decrease of the bubble initial radius, and stable cavitation only occurs when the acoustic pressure amplitude is higher than a threshold value, which can well predict the experimental results.

Influence of Spatial Structures of 316L Stainless Steel on its Cavitation Erosion Resistance

2014 ◽  
Vol 225 ◽  
pp. 109-114
Author(s):  
Beata Śniegocka ◽  
Marek Szkodo ◽  
Jarosław Chmiel
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Cavitation Erosion ◽  
316L Stainless Steel ◽  
Erosion Resistance ◽  
Spatial Structures ◽  
Erosion Test ◽  
Cavitation Erosion Resistance ◽  
Scanning Electron

Cavitation erosion performance of modified macroscopic internal structure 316L stainless steel was investigated. The samples processed by means of SLM method were subjected to cavitation erosion test. The scanning electron microscope Philips 30/ESEM was used to examine morphology of eroded surface.

Cavitation Erosion Behavior of the Antifriction Alloy YSn83

2014 ◽  
Vol 782 ◽  
pp. 257-262 ◽  
Author(s):  
Nadia Potoceanu ◽  
Marian Dumitru Nedeloni ◽  
Daniel Chirus ◽  
Danut Florea
Keyword(s):  
Cavitation Erosion ◽  
Experimental Tests ◽  
Standard Test ◽  
Test Method ◽  
Laboratory Research ◽  
Practical Applications ◽  
Erosion Test ◽  
Hydraulic Turbines ◽  
Antifriction Alloy ◽  
Materials Used

This paper presents the cavitation erosion research of the antifriction alloy YSn83 regarding on its behavior in laboratory. The antifriction alloy YSn83 is not subject to cavitation erosion in its practical applications, as is happening in reality at the materials used in hydraulic turbines, valves, piping; but the experimental tests for this material, highlight the laboratory research on its behavior by means of images and graphs in this paper. The laboratory tests were performed in accordance with the standards G32-92 (Standard Method of Vibratory Cavitation Erosion Test) and G32-10 (Standard Test Method for Cavitation Erosion Using Vibratory Apparatus).

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