Experimental Study Regarding the Cavitation and Corrosion Resistance of Stellite 6 and Self-Fluxing Remelted Coatings

Ciubotariu, Costel-Relu; Secosan, Evelina; Mărginean, Gabriela; Frunzăverde, Doina; Campian, Viorel Constantin

doi:10.5545/sv-jme.2015.2663

Cited by 15 publications

(5 citation statements)

References 6 publications

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“…Erosive damage to alloy steel with lower hardness in comparison to that of steels used in the experiment was much smaller [13,14,15]. It shows that in order to increase the resistance to cavitation erosion the surface of the metal must be more plastic.…”

Section: Resultsmentioning

confidence: 82%

“…In the reinforced upper layers of the metal which are still under further striking interactions of cumulative liquid fluxes, as a result of fatigue, micro cracks appear and their further development leads to the occurrence of erosion pits in the form of craters. Figure 2 shows a diagram of a metal damaged as a result of cumulative flux interaction [6,12,13]. Damage to the metal takes place after reaching critical values of load which is characteristic for fatigue damage of materials.…”

Section: Cavitation Implosion Energymentioning

confidence: 99%

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Studies of Erosion Resistance of Protective Coats on the Surfaces of Machine Elements Washed with Fluids

Adamkiewicz

Waliszyn

2018

Advances in Materials Science

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This article indicated at erosion as one of the causes of degradation of surfaces washed by fluids and conditions of its occurrence. Corrosive – erosive theory of metal surface degradation has been discussed linking it with an instance of destructive processes taking place in cylinder liner blocks of combustion engines. Physics and conditions influencing processes on liquid – washed operational surface phase boundary have been justified. Out of the contemporary hypotheses explaining the physics of cavitation erosion, the bubble theory has been considered. A mathematical model of erosion has been presented in the context of cavitation implosion energy determining crash interactions of liquid cumulative fluxes on the washed surface. Occurring plastic deformations have been graphically explained linking them with the occurrence of fatigue micro-cracks and later with erosive pits. Influence of initial steel hardness on intensity of cavitation erosion has been checked. Discussion of ways to increase metal surface resistance to cavitation erosion has been carried out.

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Section: Resultsmentioning

confidence: 82%

Section: Cavitation Implosion Energymentioning

confidence: 99%

Studies of Erosion Resistance of Protective Coats on the Surfaces of Machine Elements Washed with Fluids

Adamkiewicz

Waliszyn

2018

Advances in Materials Science

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“…As cavitation erosion is the effect of crashes of micro-fluxes of liquid after vapour-gas bubbles implosion, the experiment was carried out at a vibration stand using tap water as the working medium. Verification of the hypothesis of the fatigue character of erosive damage has been carried out for samples of three metals with different crystalline lattice structure: nickel 200/201, nickel alloy -monel 400 and constructional steel C45 [5,6,7]. Chemical composition of the studied nickel 200/201 and monel 400 samples is given in Tables 1 and 2.…”

Section: Comparative Studies On Resistance Of Metals With Different Crystalline Lattice Structure and Their Resultsmentioning

confidence: 99%

Studies on resistance to erosion of nickel and its alloys to be used in elements of fluid - flow machines

Waliszyn¹,

Adamkiewicz²

2019

Eksploatacja i Niezawodność – Maintenance and Reliability

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“…Furthermore, depositing a protective MCrAlY and NiCrMo coating on a base metal substrate is usually studied concerning their typical high-temperature operation conditions [ 36 , 37 ], while their sliding behaviour at ambient temperature and anti-cavitation performance are not thoroughly investigated by the literature of the object [ 38 ]. Nevertheless, a well-known fact is that cobalt-based HVOF metallic [ 28 , 39 , 40 ] and Co-WC, CoCr-WC [ 41 , 42 , 43 ] cermet coatings present superior tribological performance and resistance to cavitation erosion. The anti-cavitation properties of Ni/Co-based HVOF deposits are not completely discussed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure and Hardness on Cavitation Erosion and Dry Sliding Wear of HVOF Deposited CoNiCrAlY, NiCoCrAlY and NiCrMoNbTa Coatings

Szala¹,

Walczak²,

Świetlicki³

2021

Materials

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Metallic coatings based on cobalt and nickel are promising for elongating the life span of machine components operated in harsh environments. However, reports regarding the ambient temperature tribological performance and cavitation erosion resistance of popular MCrAlY (where M = Co, Ni or Co/Ni) and NiCrMoNbTa coatings are scant. This study comparatively investigates the effects of microstructure and hardness of HVOF deposited CoNiCrAlY, NiCoCrAlY and NiCrMoNbTa coatings on tribological and cavitation erosion performance. The cavitation erosion test was conducted using the vibratory method following the ASTM G32 standard. The tribological examination was done using a ball-on-disc tribometer. Analysis of the chemical composition, microstructure, phase composition and hardness reveal the dry sliding wear and cavitation erosion mechanisms. Coatings present increasing resistance to both sliding wear and cavitation erosion in the following order: NiCoCrAlY < CoNiCrAlY < NiCrMoNbTa. The tribological behaviour of coatings relies on abrasive grooving and oxidation of the wear products. In the case of NiCrMoNbTa coatings, abrasion is followed by the severe adhesive smearing of oxidised wear products which end in the lowest coefficient of friction and wear rate. Cavitation erosion is initiated at microstructure discontinuities and ends with severe surface pitting. CoNiCrAlY and NiCoCrAlY coatings present semi brittle behavior, whereas NiCrMoNbTa presents ductile mode and lesser surface pitting, which improves its anti-cavitation performance. The differences in microstructure of investigated coatings affect the wear and cavitation erosion performance more than the hardness itself.

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Experimental Study Regarding the Cavitation and Corrosion Resistance of Stellite 6 and Self-Fluxing Remelted Coatings

Cited by 15 publications

References 6 publications

Studies of Erosion Resistance of Protective Coats on the Surfaces of Machine Elements Washed with Fluids

Studies of Erosion Resistance of Protective Coats on the Surfaces of Machine Elements Washed with Fluids

Studies on resistance to erosion of nickel and its alloys to be used in elements of fluid - flow machines

Effect of Microstructure and Hardness on Cavitation Erosion and Dry Sliding Wear of HVOF Deposited CoNiCrAlY, NiCoCrAlY and NiCrMoNbTa Coatings

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