Influence of carbide grain size and crystal characteristics on the microstructure and mechanical properties of HVOF-sprayed WC-CoCr coatings

Wang, Dafeng; Zhang, Bo‐Ping; Jia, Chengchang; Gao, Feng; Yu, Yueguang; Chu, Ke; Zhang, Mina; Zhao, Xiaolin

doi:10.1016/j.ijrmhm.2017.08.008

Cited by 28 publications

(8 citation statements)

References 41 publications

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“…The overall view of a fracture surface is presented in Figure 6. It can be noticed that the value of static fracture toughness in the case of SM25T specimens was at a comparable level as the highest values of K IC for cemented WC described in [11][12][13][14]. It can be concluded that in the case of WC-based materials methods of their preparation plays a significant role in changing of mechanical properties.…”

Section: Resultsmentioning

confidence: 69%

“…Specimen preparation technique that was applied (and described in Section 2) led to obtain the material with relatively high K IC in comparison with cemented carbides. However, different examination procedures were taken to obtain K IC values in this study than in [11][12][13][14], where Vickers indenter was used. Thus, it would be interesting to test cemented carbides in the same way which could cause better comparison of the results.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, Wang et al showed that static fracture toughness of WC-CoCr coatings was equal to approx. 4.97-7.12 MPa•m 1/2 and depended on different WC grain characteristics [14]. Lamberson compared the values of static and dynamic fracture toughness (K ID ) for cemented WC carbides.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature several papers regarding WC-based materials fracture toughness can be found but many of them are based on computing static fracture toughness by using methods different than the ones which are the point of this study. A few standardized methods have been used so far to determine fracture toughness of WC-based materials, such as using Vickers indenter [11][12][13][14], three-point bending test [18], four-point bending test [19], double cantilever beam test [19], double torsion test [20], including pre-crack employment [17,21]. However, none of the above mentioned methods is expected to be the most reliable.…”

Section: Introductionmentioning

confidence: 99%

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Adaptation of Fracture Mechanics Methods for Quality Assessment of Tungsten Carbide Cutting Inserts

et al. 2021

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Tungsten carbide (WC) is well known as one of the hardest materials widely used in machining, cutting and drilling, especially for cutting tools production. Knowing fracture toughness grants the opportunity to prevent catastrophic wear of a tool. Moreover, fracture toughness of WC-based materials may vary because of different material compositions, as well as a different way of production. Hence, each material should be treated individually. In this paper, SM25T (HW) tungsten carbide (HW—uncoated grade, TNMR 401060 SM25T, manufactured by Baildonit company, Katowice, Poland) was taken into consideration. Sintered carbides—designated as S—are designed to be applied for machining steel, cast steel and malleable cast iron. Fracture mechanics methods were adapted to make a quality assessment of WC cutting inserts. Both quasi-statical three-point bending tests, as well as Charpy dynamic impact tests, were performed to calculate static and dynamic fracture toughness (KIC and KID, respectively). In addition, a special emphasis was placed on the microscopic analysis of fracture surfaces after impact tests to discuss material irregularities, such as porosity, cracks and so-called “river patterns”. There is a lack of scientific works in this field of study. However, cutting engineers are interested in obtaining the experimental results of that kind. Although there are a few standardized methods that may be used to determine fracture toughness of hard metals, none of them is expected to be the most reliable. Moreover, there is a lack of scientific works in the field of determining static and dynamic fracture toughness of WC by the presented method. The proposed examination solution can be then successfully used to calculate toughness properties of WC-based materials, as the results obtained seem to be with a good agreement with other works.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adaptation of Fracture Mechanics Methods for Quality Assessment of Tungsten Carbide Cutting Inserts

et al. 2021

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“…ese investigations revealed that the wear resistance is greatly influenced by the factors such as hardness, the grain size of powder, binder phase content, phase distribution, toughness, and the coating microstructure [4]. However, because of its excellent chemical strength, ceramic materials are also extensively used in different structural applications.…”

Section: Introductionmentioning

confidence: 99%

Tribological Characteristics of Carbon Nanotubes‐Reinforced Plasma‐Sprayed Al₂O₃‐TiO₂ Ceramic Coatings

Kalangi

Bolleddu

Allasi

2021

Advances in Materials Science and Engineering

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Thermal-sprayed coatings are widely used in various oil and gas industries for wear and corrosion applications. However, increasing performance and requirements make conventional coatings inadequate for future needs. Furthermore, the heat conductivity of bulk materials cannot be minimized easily. Therefore, the use of low porous coating with nanocomposite doping is an effective way to produce coatings with reduced thermal conductivity. Plasma-sprayed Al2O3-TiO2 coatings are found in a wide range of applications recently in many industries because of their exceptional properties including low expenses and ease of availability. In this work, the wear-resistant and low porous coatings of Al2O3 + 3 wt%TiO2 and respective carbon nanotube (CNT) doped coatings are prepared and characterized. The coatings are deposited on the AISI 1020 steel substrate using air plasma spraying. The impact of CNTs reinforcement on the percentage of pores and wear performance of coatings is investigated. Also, wear tracks morphology is investigated to determine the wear mechanism that is responsible for the wear of coatings. From the analysis, it is observed that the formation of cracks as well as micropores is decreased by the addition of carbon nanotubes. Moreover, uniform CNT distribution and good adhesion of coatings with the substrate are the major factors that improve the wear performance of the coated surface.

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Tungsten Carbides

Shabalin

2022

Ultra-High Temperature Materials IV

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Influence of carbide grain size and crystal characteristics on the microstructure and mechanical properties of HVOF-sprayed WC-CoCr coatings

Cited by 28 publications

References 41 publications

Adaptation of Fracture Mechanics Methods for Quality Assessment of Tungsten Carbide Cutting Inserts

Adaptation of Fracture Mechanics Methods for Quality Assessment of Tungsten Carbide Cutting Inserts

Tribological Characteristics of Carbon Nanotubes‐Reinforced Plasma‐Sprayed Al₂O₃‐TiO₂ Ceramic Coatings

Tungsten Carbides

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Influence of carbide grain size and crystal characteristics on the microstructure and mechanical properties of HVOF-sprayed WC-CoCr coatings

Cited by 28 publications

References 41 publications

Adaptation of Fracture Mechanics Methods for Quality Assessment of Tungsten Carbide Cutting Inserts

Adaptation of Fracture Mechanics Methods for Quality Assessment of Tungsten Carbide Cutting Inserts

Tribological Characteristics of Carbon Nanotubes‐Reinforced Plasma‐Sprayed Al2O3‐TiO2 Ceramic Coatings

Tungsten Carbides

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Product

Resources

About

Tribological Characteristics of Carbon Nanotubes‐Reinforced Plasma‐Sprayed Al₂O₃‐TiO₂ Ceramic Coatings