Discussion: “Cavitation Damage Studies With Rotating Disk in Water” (Wood, G. M., Knudsen, L. K., and Hammitt, F. G., 1967, ASME J. Basic Eng., 89, pp. 98–109)

1967 ◽  
Vol 89 (1) ◽  
pp. 109-110
Author(s):  
R. E. Nece
Keyword(s):  
Rotating Disk ◽  
Cavitation Damage

Cavitation Damage Studies With Rotating Disk in Water

1967 ◽  
Vol 89 (1) ◽  
pp. 98-109 ◽  
Author(s):  
G. M. Wood ◽  
L. K. Knudsen ◽  
F. G. Hammitt
Keyword(s):  
Rotating Disk ◽  
Grain Structure ◽  
Second Phase ◽  
Intergranular Cracking ◽  
Damage Resistance ◽  
Cavitation Damage ◽  
Design Changes ◽  
Heat Treated ◽  
Vortex Patterns ◽  
High Suction

The cavitation damage resistance of alloys of aluminum, columbium (niobium), tantalum, molybdenum, and stainless steel was evaluated in water using a rotating disk apparatus that simulated the cavitation vortex patterns encountered in pumps operating at high suction specific speed. The alloys in decreasing order of cavitation resistance were Ta-8W-2Hf, Cb-18W-8Hf, Ta-10W, 316SS, Mo-.5Ti, Cb-1Zr, Al-4Cu-.7Mn-.5Mg, and Al-2.5Mg-.25Cr. The damage resistance order does not follow the variation of any single property such as strain energy to failure, yield strength, or hardness, but appears to be a combination of mechanical properties and phase structure. Photomicrographs show predominant intergranular cracking for the molybdenum alloy and transgranular erosion and cracking for the remaining alloys tested. The second phase precipitate in the aluminum alloy appears to hinder the erosion of material. Investigation of small variations in the grain size of the heat-treated Cb-1Zr alloys resulted in some variation in damage resistance, with the largest grain structure exhibiting the highest resistance. Correlation curves of volume loss as a function of the peripheral velocity are presented for all materials tested. In addition, the operation of the rotating disk apparatus itself was examined in considerable detail and the effects of various design changes were evaluated.

Cavitation damage study with a rotating disk at the high peripheral velocities

1992 ◽  
Vol 30 (4) ◽  
pp. 521-538 ◽  
Author(s):  
A. Shima ◽  
H. Tomaru ◽  
A. Ihara ◽  
N. Miura
Keyword(s):  
Rotating Disk ◽  
Cavitation Damage ◽  
Damage Study

Cavitation Damage Experiments in a Rotating Disk Apparatus Especially With Regard to the Gas Content of Water

1968 ◽  
Vol 12 (02) ◽  
pp. 83-88
Author(s):  
B. W. Hansen ◽  
R. E. H. Rasmussen
Keyword(s):  
Rotating Disk ◽  
High Order ◽  
Gas Content ◽  
Cavitation Damage ◽  
Full Control

The experience obtained from earlier investigations, described in references [1,2],2 has been used in the construction of a new rotating disk apparatus, especially designed to give a high order of reproducibility and full control of the gas content of the water. The main object was to study what effect the gas content of the water has on cavitation damage.

Source Size and Velocity Effects on Cavitation Damage

1975 ◽  
Vol 97 (3) ◽  
pp. 384-386 ◽  
Author(s):  
A. S. Ramamurthy ◽  
P. Bhaskaran
Keyword(s):  
Reynolds Number ◽  
Relative Velocity ◽  
Rotating Disk ◽  
Source Size ◽  
Optimum Size ◽  
Cavitation Damage ◽  
Primary Parameter

Tests were conducted in a rotating disk facility to determine the effects of source size and velocity on cavitation damage in aluminum test specimens. To eliminate Reynolds number as a primary parameter, the shape of the cavitating source was chosen to be triangular. For a given relative velocity of the flow, there is an optimum size of the source for which the damage in the specimen is a maximum.

A Sectional Model for Investigating Microcontamination in a Rotating Disk CVD Reactor

2004 ◽  
Vol 38 (12) ◽  
pp. 1161-1170 ◽  
Author(s):  
Z. Sun ◽  
R. L. Axelbaum ◽  
R. W. Davis
Keyword(s):  
Rotating Disk ◽  
Sectional Model

Fabrication and Characterization of Nife Thin Film Composition Modulated Alloys

1996 ◽  
Vol 451 ◽  
Author(s):  
S. D. Leith ◽  
D. T. Schwartz
Keyword(s):  
Rotation Rate ◽  
Stripping Voltammetry ◽  
Rotating Disk ◽  
Oscillation Period ◽  
Rotating Disk Electrode ◽  
Disk Rotation ◽  
Rate Oscillation ◽  
Composition And Structure ◽  
Spatially Periodic

ABSTRACTDescribed are results showing that an oscillating flow-field can induce spatially periodic composition variations in electrodeposited NiFe films. Flow-induced NiFe composition modulated alloys (CMA's) were deposited on the disk of a rotating disk electrode by oscillating the disk rotation rate during galvanostatic plating. Deposit composition and structure were investigated using potentiostatic stripping voltammetry and scanning probe microscopy. Results illustrate a linear relationship between the composition modulation wavelength and the flow oscillation period. CMA's with wavelengths less than 10 nm can be fabricated when plating with a disk rotation rate oscillation period less than 3 seconds.

Sign in / Sign up

Export Citation Format

Share Document