Effects of Post-spray Heat Treatment on Hardness and Wear Properties of Ti-WC High-Pressure Cold Spray Coatings

Tang, Jonathan; Saha, Gobinda C.; Richter, Peter; Kondás, Ján; Colella, Alberto; Matteazzi, P.

doi:10.1007/s11666-018-0762-7

Cited by 26 publications

(12 citation statements)

References 21 publications

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“…Moreover, the porosity variation among the samples indicates that the selected annealing strategy contributed to the reduction of porosity of the cold-sprayed coating. The beneficial effect of the heat treatment on the coating porosity was also highlighted by Tang et al [40], who reported a decrease from above 1.7% to below 0.5% when annealed Ti-WC cermet at 650 °C for 1 h and argon atmosphere. On the contrary, Sun et al [41] reported an unaltered porosity level of Inconel 718 cold-sprayed coatings after furnace heat treatment in vacuum at 900 °C for 10 min.…”

Section: Microstructural Characterization Of the Coatingsmentioning

confidence: 61%

“…The two selected annealing routes led to a similar reduction of the coating microhardness. In the relevant literature [40,44,45], heat treatment applied to cold-sprayed coatings has been reported to alter the hardness depending on various factors such as the material, the heat treatment route, or the heat treatment technique that has been followed. More specifically, heat treatment may lead to coating densification via porosity elimination or microstructural transformations that could increase the coating hardness [40].…”

Section: Microstructural Characterization Of the Coatingsmentioning

confidence: 99%

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The effect of heat treatment and impact angle on the erosion behavior of nickel-tungsten carbide cold spray coating using response surface methodology

et al. 2021

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This study elucidates the performance of cold-sprayed tungsten carbide-nickel coating against solid particle impingement erosion using alumina (corundum) particles. After the coating fabrication, part of the specimens followed two different annealing heat treatment cycles with peak temperatures of 600 °C and 800 °C. The coatings were examined in terms of microstructure in the as-sprayed (AS) and the two heat-treated conditions (HT1, HT2). Subsequently, the erosion tests were carried out using design of experiments with two control factors and two replicate measurements in each case. The effect of the heat treatment on the mass loss of the coatings was investigated at the three levels (AS, HT1, HT2), as well as the impact angle of the erodents (30°, 60°, 90°). Finally, the response surface methodology (RSM) was applied to analyze and optimize the results, building the mathematical models that relate the significant variables and their interactions to the output response (mass loss) for each coating condition. The obtained results demonstrated that erosion minimization was achieved when the coating was heat treated at 600 °C and the angle was 90°.

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Section: Microstructural Characterization Of the Coatingsmentioning

confidence: 61%

Section: Microstructural Characterization Of the Coatingsmentioning

confidence: 99%

The effect of heat treatment and impact angle on the erosion behavior of nickel-tungsten carbide cold spray coating using response surface methodology

et al. 2021

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“…In addition, the soft magnetic performance of cold sprayed Ni/FeSiAl soft magnetic composite coating was significantly improved via stress relief and grain growth after HT [37]. The corrosion resistance of cold sprayed niobium deposits was drastically improved to nearly bulk material level after HT, which was attributed to the elimination of pores and inter-particle boundaries [36]. Moreover, the strong anisotropy of the in-plane tensile strength of cold sprayed Cu deposits could be effectively reduced after proper HT [29].…”

Section: Of 35mentioning

confidence: 97%

“…In addition, Kirkendall pores were also formed at the steel/Al splat interfaces in cold sprayed Al-SS composite coatings after HT, which was also due to the Kirkendall effect [55]. Moreover, for cold sprayed Ti-WC composite deposits, a new phase-TiC was formed after HT due to atom diffusion, which resulted in an improvement of hardness and wear resistance [36]. For cold sprayed Cu-4Cr-2Nb deposits, a new Cr 2 Nb phase was formed after HT, which could enhance the pinning effect of grain growth and dislocation movement and thus, improved the micro-hardness and strength of the deposits [30].…”

Section: Of 35mentioning

confidence: 99%

Post-Process Treatments on Supersonic Cold Sprayed Coatings: A Review

Sun

Tan

et al. 2020

Coatings

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Cold Gas Dynamic Spray or Supersonic Cold Spray, or simply ‘Cold Spray’, is an emerging technology for rapidly building thin films, thick coatings and large-scale additive manufacturing at relatively low temperatures. In a cold spray process, particles are accelerated to supersonic speeds by a propellant gas and impact a substrate, thus producing a strong bonding with the substrate and subsequently forming a deposit via layer-by-layer buildup. The scalability and low cost of this method make it promising for many applications in industry, such as metal component surface repair/enhancement/restoration and functional coatings for electrical, thermal, biomedical, energy storage, and nuclear plant applications. However, cold sprayed deposits usually require post process treatments to further modify their microstructures and mechanical properties in order to obtain the desired performances. A number of studies have been carried out on this topic. Here, recent progress in different post process treatments on cold sprayed deposits is reviewed, including heat treatment, friction-stir processing, shot peening, and laser re-melting. The effects of these post treatments on the microstructure, residual stress and mechanical properties of cold sprayed deposits are discussed.

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“…The use of these coatings together with melted binders such as nickel and copper is for quick melting through thermal-spraying techniques. WC and TiC have very high hardness (up to 700 HV) as well as the cross sectional section of a titanium-carbide coated surface [65]. The main constraint of using WC is its limited operation in moderate temperatures of up to 600 • C. CrC and TiC coatings have excellent performance up to 1100 • C. WC coatings are widely used at mid-range temperatures.…”

Section: Wear-protection Coatingsmentioning

confidence: 99%

Wear Characteristics of Superalloy and Hardface Coatings in Gas Turbine Applications–A Review

Pauzi

Ghazali

Zamri

et al. 2020

Metals

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In the gas-turbine research field, superalloys are some of the most widely used materials as they offer excellent strength, particularly at extreme temperatures. Vital components such as combustion liners, transition pieces, blades, and vanes, which are often severely affected by wear, have been identified. These critical components are exposed to very high temperatures (ranging from 570 to 1300 °C) in hot-gas-path systems and are generally subjected to heavy repair processes for maintenance works. Major degradation such as abrasive wear and fretting fatigue wear are predominant mechanisms in combustion liners and transition pieces during start–stop or peaking operation, resulting in high cost if inadequately protected. Another type of wear-like erosion is also prominent in turbine blades and vanes. Nimonic 263, Hastelloy X, and GTD 111 are examples of superalloys used in the gas-turbine industry. This review covers the development of hardface coatings used to protect the surfaces of components from wear and erosion. The application of hardface coatings helps reduce friction and wear, which can increase the lifespan of materials. Moreover, chromium carbide and Stellite 6 hardface coatings are widely used for hot-section components in gas turbines because they offer excellent resistance against wear and erosion. The effectiveness of these coatings to mitigate wear and increase the performance is further investigated. We also discuss in detail the current developments in combining these coating with other hard particles to improve wear resistance. The principles of this coating development can be extended to other high-temperature applications in the power-generation industry.

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Effects of Post-spray Heat Treatment on Hardness and Wear Properties of Ti-WC High-Pressure Cold Spray Coatings

Cited by 26 publications

References 21 publications

The effect of heat treatment and impact angle on the erosion behavior of nickel-tungsten carbide cold spray coating using response surface methodology

The effect of heat treatment and impact angle on the erosion behavior of nickel-tungsten carbide cold spray coating using response surface methodology

Post-Process Treatments on Supersonic Cold Sprayed Coatings: A Review

Wear Characteristics of Superalloy and Hardface Coatings in Gas Turbine Applications–A Review

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