Slurry erosive wear behaviour of thermally sprayed Inconel-718 coatings by APS process

Ramesh, C.S.; Devaraj, Dinakaran; Keshavamurthy, R.; Sridhar, B. R.

doi:10.1016/j.wear.2011.01.057

Cited by 57 publications

(18 citation statements)

References 13 publications

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“…This was attributed to the microstructure and properties including microhardness and corrosion resistance of the AT13 coatings. The AT13 coating with the microstructure of more pores, cracks, and the properties of low microhardness and corrosion resistance could be easily damaged by the outside impacts, which was caused by the synergy of corrosion and friction [20,27]. The low microhardness and corrosion resistance accelerated the wear and corrosion failure of the coatings, consequently bringing in the more weight loss in locations of pores and cracks.…”

Section: Corrosion Behaviors Of the At13 Coatingsmentioning

confidence: 99%

Fabrication and Property Evaluation of the Al2O3-TiO2 Composite Coatings Prepared by Plasma Spray

et al. 2020

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The Al2O3-13 wt.% TiO2 (AT13) composite coatings were prepared on Q235 steel by plasma spray technique. The spray parameters were designed by the orthogonal experiments, and the properties of the coating were evaluated. Results showed that with respect to the bond strength of the coating, the optimized spraying parameters were the plasma current of 530 A, Ar flow of 41 L/min, H2 flow of 10 L/min, and spray standoff distance of 100 mm. The plasma spray process led to the transition of α-Al2O3 to γ-Al2O3, resulting in the increase in the porosity of AT13 coating prepared at nonoptimized parameters. Meanwhile, the porosity and cracks were also increased due to the decrease in the Ar flow and the increase in spray standoff distance. The low porosity, a few cracks, and the uniformly dispersed TiO2 particles contributed the enhanced properties including mechanical and corrosion behaviors of the AT13 coating prepared at optimized parameters. The bond strength, microhardness, and thermal shock resistance of the AT13 coating could reach 25.01 MPa, 1000.6 HV0.5, and 40 times when the coating was prepared at optimized parameters, respectively. Especially, the static Icorr of the AT13 coating prepared at optimized parameters was two order of magnitude less than that of Q235 steel. In addition, the erosion weight loss of Q235 steel could be decreased about 30 times by the protection of the AT13 coating.

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Section: Corrosion Behaviors Of the At13 Coatingsmentioning

confidence: 99%

Fabrication and Property Evaluation of the Al2O3-TiO2 Composite Coatings Prepared by Plasma Spray

et al. 2020

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“…The XRD pattern (Figure 4c) of assprayed coating of Alloy-718 showed the solid solution of Ni-Cr-Fe as a major phase along with some oxides such as Al 2 O 3 , Cr 2 O 3 , and NiO. The oxides may be formed due to oxidation of in-flight powder particles during the deposition of coating [18].…”

Section: Microstructural Studymentioning

confidence: 99%

High Temperature Oxidation and Wear Resistant Bi-Layer Coating for Turbocharger Housing

Vasudev¹,

Thakur²,

Bansal³

2020

Methods for Film Synthesis and Coating Procedures

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An upsurge in the demand of higher power generation has been observed in the last few decades. Consequently, the mechanical components of power generation are forced to operate in the extreme working conditions for longer duration, which results in the accelerated wear and corrosion of the material. Conventional material such as grey cast iron (GCI) is a preferred material of components used for power generation at high temperature. Grey cast iron exhibits poor wear and corrosion resistance at high temperature. On the other hand, an advanced material such as Alloy-718 is capable to withstand the high-temperature wear and oxidation for prolonged duration of time. In the current research, high temperature corrosion and erosive wear performance of grey cast iron (GCI) components has been enhanced by depositing a bi-layerAlloy-718/NiCrAlY coating by using high velocity oxy-fuel (HVOF) thermal spray process. Furthermore, the high temperature corrosion and erosion behaviour of GCI substrate and the deposited coating has been discussed. The various characterization techniques such as scanning electron microscopy (SEM) X-ray diffraction, and Vickers micro-hardness testing were conducted for the GCI substrate and Alloy-718 coating, respectively. The Alloy-718 coting showed the increased resistance against high-temperature erosion and oxidation, which can be attributed to its good bonding with the substrate, high hardness and formation of protective phases at high-temperature.

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“…Unfortunately, cavitation is only a single type of erosion and there are numerous manufacturing methods, so studies specifically about cavitation erosion of SLM Inconels are relatively rare. Some example of slightly related studies include cavitation erosion of Inconel 625 coatings manufactured by cold spray [ 14 ] and the fatigue performance of Inconel 625 weld claddings [ 15 ]. As for Inconel 718, studies on its high temperature erosion [ 16 ], dry erosion wear performance [ 17 ] and slurry erosion [ 18 ] can be found.…”

Section: Introductionmentioning

confidence: 99%

Cavitation Erosion of Ni-Based Superalloys Manufactured by Forging and Additive Manufacturing

Taillon

Miyagawa

2021

J Fail. Anal. and Preven.

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Inconel pipes that transport cryogenic fluids in rocket engines manufactured by additive manufacturing (AM) were eroded by cavitation. The AM method selective laser melting (SLM) was used to manufacture at lower cost, but had seemingly lower erosion resistance. The cavitation erosion properties of Inconel 625 and 718 are studied as a function of hardness and surface roughness with the ASTM G134 cavitating jet. The samples were studied 3 surface conditions, as deposited/as used in applications, machined and polished, for both forged and AM manufacturing. Indentation reveals slight surface hardening for machined samples. X-ray diffraction (XRD) shows similar polycrystalline γ -Ni-based microstructure for all samples. Scanning electron microscopy (SEM) images of the cut cross-sections reveal the fractures and pits, as well as some porosity in the case of SLM samples. Images of the surfaces during erosion reveal some fracture mechanisms: machined samples erosion start quickly on pits and scratches. The SLM718 samples were found to have good cavitation erosion resistance if machined, while the SLM625 samples have comparatively poorer resistance. As-deposited samples have the lowest resistance, and surprisingly machined samples are more resistant than polished.

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Slurry erosive wear behaviour of thermally sprayed Inconel-718 coatings by APS process

Cited by 57 publications

References 13 publications

Fabrication and Property Evaluation of the Al2O3-TiO2 Composite Coatings Prepared by Plasma Spray

Fabrication and Property Evaluation of the Al2O3-TiO2 Composite Coatings Prepared by Plasma Spray

High Temperature Oxidation and Wear Resistant Bi-Layer Coating for Turbocharger Housing

Cavitation Erosion of Ni-Based Superalloys Manufactured by Forging and Additive Manufacturing

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