Performance of wear resistant MCrAlY coatings with oxide dispersion strengthening

Bolelli, Giovanni; Vorkötter, Christoph; Lusvarghi, Luca; Morelli, Stefania; Testa, Veronica; Vaßen, Robert

doi:10.1016/j.wear.2019.203116

Cited by 14 publications

(13 citation statements)

References 34 publications

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“…In other words, utilised test conditions allow obtaining reliable tribological results for the as-sprayed coatings. Nonetheless, the investigated HVOF coatings present inferior wear behaviour compared to other MCrAlY, and NiCrMo mostly tested at elevated temperatures [ 13 , 22 , 63 ], as well as to ceramic [ 10 , 45 ], metallic [ 44 , 46 ] materials tested at the same load at ambient temperature.…”

Section: Resultsmentioning

confidence: 98%

“…A broad range of materials is deposited via the HVOF method, such as metals, ceramics and composites. Overall, the main application of thermally sprayed coatings is protection against different types of wear [ 10 , 11 , 12 , 13 ], and more sophisticated implementation involves the prevention from cavitation erosion [ 14 , 15 , 16 ]. Besides, industrial applications combine these two deterioration processes, such as pressure values, diesel liners or specialised chemical equipment.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 98%

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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“…A widely accepted approach is to divide them according to the heat or energy source. Two of the most widely used thermal spraying technologies for depositing the wear-resistant coatings are HVOF and APS [9]. Figure 5 depicts a general concept of this process.…”

Section: Thermal Sprayingmentioning

confidence: 99%

“…Plasma-sprayed composite coatings of these powders have shown effective lubrication, better tribological performance, and improved adhesion [8]. That being said, the aforementioned coatings face some shortcomings such as dimensional instability, low oxidation and hot corrosion resistance when being used in higher temperature regimes (especially above ≈ 750 • C) [9].…”

Section: Introductionmentioning

confidence: 99%

A Review on the Enhancement of Mechanical and Tribological Properties of MCrAlY Coatings Reinforced by Dispersed Micro and Nanoparticles

2022

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The application of metal-matrix composite coatings for protecting and improving the service life of sliding components has demonstrated to have the potential of meeting the requirements of a diverse range of engineering industries. Recently, a significant body of research has been devoted to studying the mechanical and tribological performance of dispersion-strengthened MCrAlY coatings. These coatings belong to a class of emerging wear-resistant materials, offering improved properties and being considered as promising candidates for the protection of engineering structural materials exposed to tribological damage, especially at elevated temperature regimes. This paper attempts to comprehensively review the different reinforcements used in the processing of MCrAlY-based alloys and how they influence the mechanical and tribological properties of the corresponding coatings. Furthermore, the major fabrication techniques together with their benefits and challenges are also reviewed. Discussion on the failure mechanisms of these coatings as well as the main determining factors are also included. In addition, a comprehensive survey of studies and investigations in recent times are summarized and elaborated to further substantiate the review.

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“…Then, oxidation resistance of metallic materials at high temperature has become a point of interest for researchers. The increase in oxidation resistance can be achieved by applying of oxidation resistant coatings like, e.g., aluminide layers (Ref [11][12][13][14] or MCrAlY-type coatings (Ref [15][16][17][18], however, this is an additional process which generates additional costs. It was already shown that by the simple surface preparation methods resulting in different surface roughness, high temperature oxidation kinetics of metallic materials can be affected (Ref [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Roughness on Oxidation Resistance of Stainless Steel AISI 316Ti During Exposure at High Temperature

Nowak

2020

J. of Materi Eng and Perform

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In the present work, the influence of surface roughness on oxidation kinetics of AISI 316Ti stainless steel and its consequences in term of oxidation resistance were investigated. Namely, the effect of surface roughness on oxidation resistance was evaluated during different types of cyclic oxidation tests at 900 and 1000 °C. The obtained results revealed that alloy possessing higher surface roughness showed longer lifetime compared to that with lower surface roughness. It was also found that more severe cyclic conditions suppressed the positive effect of surface roughness on sample’s lifetime. The better oxidation resistance of rougher alloy was correlated with suppressed formation of Fe-rich nodules on ground surfaces and explained by the combined effect of introduced defects in the near-surface region and possible increase in residual stresses caused by mechanical surface preparation.

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Performance of wear resistant MCrAlY coatings with oxide dispersion strengthening

Cited by 14 publications

References 34 publications

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

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

A Review on the Enhancement of Mechanical and Tribological Properties of MCrAlY Coatings Reinforced by Dispersed Micro and Nanoparticles

Effect of Surface Roughness on Oxidation Resistance of Stainless Steel AISI 316Ti During Exposure at High Temperature

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