Structure of Al–Ni intermetallic composite layers produced on the Inconel 600 by the glow discharge enhanced-PACVD method

Tacikowski, M.; Sitek, Ryszard; Sikorski, K.; Wierzchoń, T.

doi:10.1016/j.intermet.2009.06.010

Cited by 14 publications

(4 citation statements)

References 26 publications

(37 reference statements)

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“…In the 1960s, the first protective layers on the superalloys were applied after extensive research to increase high oxidation resistance and high stability as well as to achieve a good combination of physical and mechanical features. These include the first diffusion aluminide coatings, overlay coatings, thermal barrier coatings (TBC), or relatively new coating produced with nitriding processes [ 8 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Ion Nitriding on Microstructure and Properties of Haynes 282 Nickel Superalloy Specimens Produced Using DMLS Technique

et al. 2023

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The paper investigates the influence of the ion-nitriding process on the microstructure, corrosion resistance, and tensile strength at elevated temperatures of Haynes 282 nickel superalloy specimens produced by the Direct Metal Laser Sintering (DMLS) technique. The study was performed for two conditions, i.e., as-built by DMLS method and as-built by DMLS method + covered by a layer containing CrN + Cr2N phases. An analysis of the surface morphology revealed that the ion-nitriding process significantly affects the physical and chemical phenomena occurring on the specimen’s surface. The XRD measurement of the specimens showed that preparing them with the DMLS method as well as following a nitriding process produced residual tensile stresses. Based on the measurement of the nanohardness distribution through the layer approximatively of 7 μm in width and the superalloys substrate, the results of the nanohardness showed the maximum values of 27 GPa and 13.5 GPa for the nitrided layer and the substrate, respectively. The surface protection from the nitrided layer proved a positive effect on the corrosion resistance of the DMLS specimens in the solution of 0.1 M Na2SO4 + 0.1 M NaCl at room temperature. The results of the tensile tests at 750 °C showed that the ion-nitriding process did not significantly affect the elevated-temperature tensile strength of the superalloy specimens produced with the DMLS technique.

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Section: Introductionmentioning

confidence: 99%

Influence of Ion Nitriding on Microstructure and Properties of Haynes 282 Nickel Superalloy Specimens Produced Using DMLS Technique

et al. 2023

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“…The chemical composition of the gas atmosphere in the reactor has a decisive influence on the microstructure and features of the coating to be created. In the available literature [6,[9][10][11][12][13] there are technologies for creating aluminide sub-layers on the superalloys nickel and titanium bases, there are also defined mechanisms of aluminide coating reinforcement, as well as influences of nickel, aluminum and palladium on the structure, mechanical features and exploitation features of the tested materials. However, little work has been carried out using the CVD technology for production of an AlNi coating on Inconel 625 alloy.…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of the Aluminide Coatings on the Inconel 625 Superalloy

Adamiak

Bochnowski

Dziedzic

et al. 2016

High Temperature Materials and Processes

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The research samples used in this study were based on the Inconel 625 alloy; the examined samples were coated with aluminide films deposited in a lowactivity chemical vapor deposition (CVD) process. The samples' microstructure was investigated with optical and electron microscopy and energy dispersive X-ray spectroscopy analysis. Hardness measurements were performed using Vickers and Berkovich test methods. The adhesion of the aluminide coating was determined by fractography. It was shown that the fracture mechanism was different for the respective zones of the aluminide coating and the substrate material. The outer zone of the aluminide coating is characterized by an intercrystalline fracture, with a small contribution of transcrystalline fracture within individual grains (large crystallites in the bottom of the zone, composed of smaller crystallites, also show an intercrystalline fracture). The substrate material exhibited a ductile intercrystalline fracture. Based on this investigation, an increase of the microhardness of the material occurring at loads below 0.2 N was observed. When determining microhardness of aluminide coating it is necessary to take into account the optimal choice of the indentation tip.

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“…NiAl phase exhibits the most advantageous properties due to the requirements for aircraft engine turbine components [3,4]. This phase is characterized by good properties such as: high melting point, low density, high elastic modulus and high oxidation resistance in elevated temperatures [5,6]. However, layers based on NiAl phase does not fulfill such requirements as: good adhesion, ductility and high tensile strength at low temperatures [7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and corrosion resistance of Hf-modified NiAl layers on nickel based superalloy Ni-Cr-Co-Mo-2Ti-1.5Al

et al. 2015

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Article discusses examination of aluminizing and Hf modification impact on the microstructure and corrosion resistance of manufactured layers with use of CVD method on a substrate of nickel based superalloyNi-Cr-Co-Mo-2Ti-1.5Al. The effect of modification process on microstructure, phase and chemical composition and corrosion resistance of manufactured layers was examined. Corrosion resistance of base material and material with protective layers was also compared. The effect of Hf modifications on surface morphology and thickness of layers and corrosion resistance of substrate was demonstrated. Keywords: superalloy, NiAl layer, intermetallic layer, oxidation, layer modification, microstructure, corrosion resistance, phase composition Streszczenie: Warstwy ochronne na bazie międzymetalicznej fazy NiAl stosowane są powszechnie do poprawy odporności na utlenianie wysokotemperaturowe odpowiedzialnych elementów turbin silników lotniczych. W pracy omówiono wyniki badań właściwości warstw NiAl oraz warstw NiAl modyfikowanych Hf oraz ich wpływu na mikrostrukturę podłoża -nadstopu niklu Ni-Cr-Co-Mo-2Ti-1,5Al. Procesy aluminiowania realizowano metodą CVD w atmosferze wodoru jako gazu nośnego. Przeprowadzono obserwacje mikrostruktury warstw oraz podłoża, badania składu chemicznego i fazowego warstw. Stwierdzono, że wytworzone warstwy wykazują ciągłość na całej powierzchni próbek, stabilność składu chemicznego i fazowego oraz nie wpływają na mikrostrukturę stopu. Słowa kluczowe: nadstop, warstwa NiAl, warstwa na bazie fazy międzymetalicznej, utlenianie, modyfikacja warstwy, mikrostruktura, odporność korozyjna, skład fazowy

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Structure of Al–Ni intermetallic composite layers produced on the Inconel 600 by the glow discharge enhanced-PACVD method

Cited by 14 publications

References 26 publications

Influence of Ion Nitriding on Microstructure and Properties of Haynes 282 Nickel Superalloy Specimens Produced Using DMLS Technique

Influence of Ion Nitriding on Microstructure and Properties of Haynes 282 Nickel Superalloy Specimens Produced Using DMLS Technique

Structure and Properties of the Aluminide Coatings on the Inconel 625 Superalloy

Microstructure and corrosion resistance of Hf-modified NiAl layers on nickel based superalloy Ni-Cr-Co-Mo-2Ti-1.5Al

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