Investigation on the cavitation damage behavior with temperature and cavitation time in seawater

Park, Jae-Cheul; Han, Min-Su; Kim, Seong-Jong

doi:10.1002/sia.4957

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…Particularly, oil‐free and lead‐free self‐lubricated materials are desiderated in the massive frictional components of marine systems that work in seawater medium, such as seawater desalting plant and seawater fire‐fighting pump. Aluminum–bronze (CuAl) alloy is an important candidate as a lead‐free and self‐lubricated material in the marine system in consideration of its good friction‐reducing and anti‐corrosion properties . CuAl is a copper‐based alloy with 5–14% Al, which can greatly increase the strength and maintain the friction‐reducing property of the copper matrix.…”

Section: Introductionmentioning

confidence: 99%

“…Aluminum-bronze (CuAl) alloy is an important candidate as a lead-free and self-lubricated material in the marine system in consideration of its good friction-reducing and anti-corrosion properties. [4][5][6][7] CuAl is a copper-based alloy with 5-14% Al, which can greatly increase the strength and maintain the friction-reducing property of the copper matrix. Additionally, through plasma spraying, CuAl coating can be easily deposited on corrosion/wear sensitive substrates with hardly any harmful effect because of the avoidance of intensive heat input during plasma spraying.…”

Section: Introductionmentioning

confidence: 99%

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Sliding friction and wear behaviors of plasma sprayed aluminum-bronze coating in artificial seawater

Yang

Hou

et al. 2014

Surf. Interface Anal.

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The friction and wear behaviors of plasma sprayed aluminum–bronze (CuAl) coating sliding against silicon nitride (Si3N4) in artificial seawater were investigated and compared with those in pure water and dry sliding. The morphologies of the worn surfaces were analyzed by three‐dimensional non‐contact surface mapping and scanning electron microscopy. Moreover, chemical states of the tribochemical products of CuAl/Si3N4 in seawater were characterized by X‐ray photoelectron spectroscopy. Results show that the plasma sprayed CuAl coating possessed a specific wear rate (in order of 10−7 mm3/Nm) in seawater more than 600 times smaller than that in dry sliding due to the great alleviation in abrasion wear and splats delamination. Besides, the CuAl/Si3N4 had a friction coefficient of 0.06 in seawater, significantly lower and more stable than those in pure water and dry sliding. The tribochemical products of CuAl/Si3N4 in seawater, which were proved to be silica, alumina, and their hydrates, transformed into a loosened wear‐debris layer under the coagulation effect of the seawater and dominated the excellent lubrication state in artificial seawater. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sliding friction and wear behaviors of plasma sprayed aluminum-bronze coating in artificial seawater

Yang

Hou

et al. 2014

Surf. Interface Anal.

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“…For example, enhancing heat transfer in two-phase electronics cooling applications is continually important as chip power density increases. Additionally, evidence suggests that for some materials, cavitation damage is proportional to material temperature [19]; thus, predicting erosion rates and seal failure in control valves or pressure relief valves during cavitation may be improved by a knowledge of heat transfer between the flow and solid surfaces.…”

Section: Sub-cooled Liquid Throatmentioning

confidence: 99%

Heat transfer characteristics of R-134a in a converging-Diverging nozzle

Mann¹,

Madamadakala²,

Eckels³

2016

International Journal of Heat and Fluid Flow

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Heat transfer characteristics of cavitating flows in the diverging section of a converging-diverging nozzle, with R-134a as the working fluid were investigated for mass fluxes from 11.3-52.3 kg m −2 s −1 and heat fluxes from 52.6-693 kW m −2 . Eleven different nozzle configurations were examined with different divergence angles, throat diameters, inlet profiles, and lengths. Heat flux measurement assumptions were analyzed using numerical conduction simulations with ANSYS Fluent. Experimental results indicated two different heat transfer regimes at high Reynolds number-one high and one low-likely due to wall dryout. A temperature drop with a strong correlation to Reynolds number as well as inlet profile was recorded due to the cavitationinduced phase change. Additionally, data showed two-phase heat transfer coefficients from 3.7 to as high as 285kW m −2 K −1 . Chen's correlation compared well with the recorded heat transfer coefficients for low Reynolds numbers. Variation of heat transfer coefficients with different geometry parameters were given, and potential sonic effects were discussed. With such high heat transfer coefficients, cavitation enhanced heat transfer in converging-diverging nozzles could be of significant use in electronics cooling applications.

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“…These properties make them highly versatile alloys and the basic fields of application are linked to the manufacture of valves, turbines, and marine propellers. [1][2][3][4] The propeller's manufacturing methods frequently include fixing the blades to the hub or boss through welding or forging, yielding one object, finally. In some cases, blades and hubs are made of different materials such as NAB and MAB.…”

Section: Introductionmentioning

confidence: 99%

Corrosion evaluation of welded nickel aluminum bronze and manganese aluminum bronze in synthetic sea water

Cobo

Biezma

Linhardt

2022

Materials & Corrosion

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Nickel aluminum bronze (NAB) and manganese aluminum bronze (MAB) are highly alloyed bronzes that are increasingly employed in several industrial sectors mainly related to the hostile environment due to their excellent resistance against corrosion, cavitation, erosion, and improved mechanical properties in comparison with other copper-based alloys. These materials are sensitive to thermal treatments, such as welding, due to a multiphase microstructure in cast conditions. To contribute to the knowledge of the behavior of both alloys, the effect of welding processes on the corrosion behavior of NAB (CuAl10Fe5Ni5) and MAB (CuMn12Al8Fe4Ni2) is studied.As the microstructures of the parent zone (PZ), heat-affected zone (HAZ), and weld seam (WS) may be quite different, the consequences with respect to corrosion behavior must be considered. In this study, the influence on corrosion behavior in synthetic sea water (SSW) was investigated using different welded test coupons representing identical (symmetrical) and hybrid joints of NAB and MAB. The microstructures of the welded samples were characterized by metallography using two chemical agents and examined by optical and scanning electron microscopy. By electrochemical corrosion testing, the major effect of welding processes on the corrosion behavior was found in influencing the amount and distribution of β-phase which is prone to selective corrosion.

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Investigation on the cavitation damage behavior with temperature and cavitation time in seawater

Cited by 8 publications

References 5 publications

Sliding friction and wear behaviors of plasma sprayed aluminum-bronze coating in artificial seawater

Sliding friction and wear behaviors of plasma sprayed aluminum-bronze coating in artificial seawater

Heat transfer characteristics of R-134a in a converging-Diverging nozzle

Corrosion evaluation of welded nickel aluminum bronze and manganese aluminum bronze in synthetic sea water

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