Search results for: J. Sieniawski

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article

Plazmowe utlenianie elektrolityczne jako metoda ochrony przed korozją magnezu i jego stopów

Ł. Florczak, G. Nawrat, P. Kwolek, J. Sieniawski, more

Przemysł Chemiczny > 2018 > T. 97, nr 12 > 2145--2153

Przedstawiono charakterystykę fizycznych i chemicznych właściwości magnezu i jego stopów, proces ich korozji i metody jej przeciwdziałania. Szczegółowo opisano proces plazmowego utleniania elektrolitycznego ze względu na jego szerokie zastosowanie do wytwarzania warstw ochronnych na magnezie i jego stopach. Przedstawiono podstawy teoretyczne tego procesu oraz omówiono wpływ elektrycznych i chemicznych...

article

Sodium molybdate as the corrosion inhibitor of aluminium alloys in the acidic solution

P. Kwolek, J. Sieniawski

Ochrona przed Korozją > 2018 > nr 4 > 86--89

The influence of the initial concentration of sodium molybdate on the mechanism of corrosion of the unalloyed aluminium (1050) and Al2Cu phase in 0.5 M H3PO4 was studied. Sodium molybdate is a promising alternative for chromate-containing corrosion inhibitor of aluminium alloys in the acidic media. In the studied solutions, molybdic blue species are formed. They are efficient inhibitors of corrosion...

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Investigation of tool wear in the turning of Inconel 718 superalloy in terms of process performance and productivity enhancement

W. Grzesik, P. Niesłony, W. Habrat, J. Sieniawski, more

Tribology International > 2018 > 118 > C > 337-346

This paper contributes to broadening the knowledge regarding cutting tool wear in the finish turning operations of nickel-chromium-based superalloy Inconel 718. Three cutting tools coated with heat isolating TiAlN/AlTiN layers with different stoichiometry ratios recommended as specially designed cutting tools for aerospace industry applications are tested. The primary comparison of tool wear resistance...

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Metodyka pomiaru amplitudy drgań pióra łopatki sprężarki silników lotniczych w próbie zmęczeniowej

L. Bielenda, W. Obrocki, M. Masłyk, J. Sieniawski

Mechanik > 2018 > R. 91, nr 3 > 230--232

Przeanalizowano wyniki badań porównawczych różnych typów czujników stosowanych w pomiarach amplitudy drgań pióra łopatki sprężarki silników lotniczych w próbie zmęczeniowej. Zbadano czujniki: indukcyjny, pojemnościowy, wiroprądowy, laserowy oraz drgań. Scharakteryzowano je i przedstawiono ich wady. Zaprojektowano i wykonano dodatkowe oprzyrządowanie stanowiska badawczego, m.in. uchwyt mocujący.

article

Wpływ uszkodzenia krawędzi natarcia łopatek sprężarki silnika lotniczego na ich wytrzymałość zmęczeniową

W. Obrocki, A. Setkowicz, M. Masłyk, J. Sieniawski

Mechanik > 2018 > R. 91, nr 3 > 205--209

Przeanalizowano wyniki badań wpływu długości uszkodzenia pióra łopatki sprężarki silnika lotniczego (z uwzględnieniem położenia tego uszkodzenia na krawędzi pióra) na jej wytrzymałość zmęczeniową w warunkach dużej liczby cykli. Opracowano kryteria klasyfikacji uszkodzeń łopatki oraz metodykę badań. Zaprojektowano i wykonano oprzyrządowanie do próby zmęczeniowej łopatek sprężarki. Do ustalenia źródła...

article

Manufacture of two-layer castings using Fe base heat-resistant alloys

G. Rzepka, J. Nawrocki, J. Sieniawski

Advances in Manufacturing Science and Technology > 2018 > Vol. 42, nr 1-4 > 31--41

The main purpose of the present study is to verify the possibility of joining grey iron EN-GJL-250 with heat resistant ductile iron GJS-XSiMo5-1 and heat resistant cast steel GX40CrNiSiNb25-20 to create the two-layered material using casting process with materials in liquid state and in solid state. The mentioned above method was assumed to solve in an economically justified manner the problem of...

article

Cyclic oxidation of palladium modified and nonmodified aluminide coatings deposited on nickel base superalloys

M. Zagula-Yavorska, J. Sieniawski

Archives of Civil and Mechanical Engineering > 2018 > Vol. 18, no. 1 > 130--139

Palladium layer (7 μm thick) was deposited on the surface of the Inconel 713 LC, Inconel 625 and CMSX 4 Ni-base superalloys by the electroplating method. Electroplated samples were annealed at 1050 °C for 2 h in the argon atmosphere. The aluminide coatings were deposited by the CVD method. The nonmodified aluminide coating consists of the NiAl phase. Palladium modification let to formation of the...

article

Investigation of casting–ceramic shell mold interface thermal resistance during solidification process of nickel based superalloy

D. Szeliga, K. Kubiak, W. Ziaja, R. Cygan, more

Experimental Thermal and Fluid Science > 2017 > 87 > C > 149-160

The study of thermal resistance (TR) at the casting-mold interface has been performed to describe the solidification process aimed at the improvement of technology and the reduction of defect quantity of investment castings. The analysis of thermal resistance at casting–mold interface between the solidifying IN 713C nickel superalloy plate casting and ceramic shell mold has been presented. The temperature...

article

Subgrain boundaries in single crystal blade airfoil of aircraft engine

W. Bogdanowicz, J. Krawczyk, A. Tondos, J. Sieniawski

Crystal Research and Technology > 52 > 8 > n/a - n/a

The single crystal turbine blades of aircraft engine were obtained by directional solidification of Ni‐based superalloy via Bridgman technique at withdrawal rate of 5 mm/min. The CMSX‐4 industrial alloy were used for crystallization. After crystallization the blades were subjected to heat treatment. The Laue diffraction, X‐ray diffraction topography and SEM methods were used to investigate the subgrain...

article

Microstructural characterization of creep in the single crystal superalloy CMSX–4

R. Albrecht, W. Bogdanowicz, K. Gancarczyk, J. Rak, more

Inżynieria Materiałowa > 2017 > Vol. 38, nr 1 > 15--19

Blades and vanes structural components of turbine engines are processed to withstand high temperature during loading conditions of service, fulfilling high standards of quality control and safety for effective use. Therefore, characterization of mechanical properties, such as creep behaviour, are necessary for appropriate control procedures on prediction of exploitation lifetime. The materials mostly...

article

The application of tumble finishing in surface preparation process for deposition of TBC coatings

S. Kotowski, A. Nowotnik, J. Sieniawski, A. Butkiewicz

Inżynieria Materiałowa > 2017 > Vol. 38, nr 1 > 8--14

Thermal barrier coatings (TBC) are widely used for protection of turbine blades against aggressive thermomechanical and chemical degradation during operation in hot section of aircraft engine. Quality and properties of TBC coating is strictly related to preparation of substrate material (grinding, and rounding off edges, polishing and cleaning). In the article, tumble finishing as method for surface...

article

Numerical Simulation of Directional Solidification Process of Single Crystal Ni- Based Superalloy Casting

D. Szeliga, K. Kubiak, J. Sieniawski

Archives of Foundry Engineering > 2017 > Vol. 17, iss. 2 > 111--118

The analysis of influence of mould withdrawal rate on the solidification process of CMSX-4 single crystal castings produced by Bridgman method was presented in this paper. The predicted values of temperature gradient, solidification and cooling rate, were determined at the longitudinal section of casting blade withdrawn at rate from 1 to 6mm/min using ProCAST software. It was found that the increase...

article

The Precipitation Processes and Mechanical Properties of Aged Inconel 718 Alloy after Annealing

P. Maj, B. Adamczyk-Cieślak, M. Slesik, J. Mizera, more

Archives of Metallurgy and Materials > 2017 > Vol. 62, iss. 3 > 1695--1702

Inconel 718 is a precipitation hardenable nickel-iron based superalloy. It has exceptionally high strength and ductility compared to other metallic materials. This is due to intense precipitation of the γ’ and γ” strengthening phases in the temperature range 650-850°C. The main purpose of the authors was to analyze the aging process in Inconel 718 obtained in accordance with AMS 5596, and its effect...

article

External force field during diffusion : sedimentation in condensed matter

B. Wierzba, W. J. Nowak, P. Wierzba, J. Sieniawski

Computer Methods in Materials Science > 2017 > Vol. 17, No. 1 > 18--21

In this paper numerical description of the external force field during interdiffusion is discussed. Two methods of modeling the sedimentation process will be presented. Mainly, the steady state and evolutionary approximation. The proposed approaches will based on the generalized Darken method. The main equations will be the mass conservation and equation of motion. Thus the simultaneous action of...

article

Laser Surfacing of Superalloy Inconel 738LC-Based Alloy Stellite 694 – Overlay Weld Imperfections

A. Gradzik, J. Nawrocki, G. Mrówka-Nowotnik, J. Sieniawski

Biuletyn Instytutu Spawalnictwa w Gliwicach > 2017 > Vol. 61, No. 4 > 25--31

The research involved the analysis of test results concerning the effect of laser surfacing process conditions on the characteristics of an overlay weld made of alloy Stellite 694 on the substrate of nickel superalloy Inconel 738LC as well as the determination and specification of the most common overlay weld imperfections. The overlay weld subjected to the tests was made using a Yb:YAG disc laser...

article

The influence of H2/HCL ratio on aluminizing by CVD method

B. Wierzba, W. J. Nowak, P. Wierzba, M. Góral, more

Advances in Manufacturing Science and Technology > 2017 > Vol. 41, nr 2 > 53--61

In this manuscript the theoretical studies of aluminisation by CVD method is shown. The bi-velocity model of multicomponent and multiphase diffusion is used to calculate the growth of β-NiAl phase under different ranges of miscibility (HCl to H2 ratio). The composition dependent diffusivities of β-NiAl and Ni3Al at 1350 K are presented and used in calculations.

article

Strain distribution of aircraft engine compressor blade surface applying numerical and experimental methods

A. Setkowicz, W. Obrocki, J. Sieniawski, W. Ziaja

Advances in Manufacturing Science and Technology > 2017 > Vol. 41, nr 2 > 43--52

Paper contains an analysis of the 1st stage compressor blade strain distribution. Boundary conditions analysis was presumed for blade clamped in the fatigue holder. Strain distribution verification was performed for blade fundamental frequency. Numerical method results were verified with experimental (strain gauge) method.

article

Comparison of aircraft engine compressor blade finite life fatigue strength determination methods

W. Obrocki, A. Setkowicz, M. Masłyk, J. Sieniawski

Advances in Manufacturing Science and Technology > 2017 > Vol. 41, nr 3 > 47--55

The paper presents a comparison of selected fatigue strength test methods to determine the average finite life fatigue strength. The tests were performed on aircraft engine compressor blades. The paper covers blades fatigue tests results performed using electrodynamic shaker.

article

Oxide scale formation on in 792 at early stages of high temperature exposure

W. J. Nowak, P. Wierzba, B. Wierzba, J. Sieniawski

Advances in Manufacturing Science and Technology > 2017 > Vol. 41, nr 1 > 65--74

In the present work a commercially available Ni-base superalloy IN 792 was exposed at 1050°C up to 50 hours in Ar+O₂(20%) for investigation of its oxidation kinetics as well as oxide scale formation. It was observed that the alloy formed chromium rich oxide scale. However, detailed analysis, including glow discharge optical emission spectroscopy (GD-OES) and scanning electron microscopy (SEM) showed...

article

Numerical vibration analysis of turbine engine compressor blades depending on geometry and position of the damage

P. Rygiel, W. Obrocki, J. Sieniawski

Advances in Manufacturing Science and Technology > 2017 > Vol. 41, nr 1 > 43--55

Paper presents the description of the Finite Element Method used to determine the first frequency shape of the Turbine Engine compressor blade. Numerical calculations were conducted on blades with damages modelled on the CAD (Computer Aided Design) model at different positions and different depth. Reduced stress and frequency of the damaged and undamaged blades are the results of presented work.

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INFONA - science communication portal

Search results for: J. Sieniawski

Plazmowe utlenianie elektrolityczne jako metoda ochrony przed korozją magnezu i jego stopów

Sodium molybdate as the corrosion inhibitor of aluminium alloys in the acidic solution

Investigation of tool wear in the turning of Inconel 718 superalloy in terms of process performance and productivity enhancement

Metodyka pomiaru amplitudy drgań pióra łopatki sprężarki silników lotniczych w próbie zmęczeniowej

Wpływ uszkodzenia krawędzi natarcia łopatek sprężarki silnika lotniczego na ich wytrzymałość zmęczeniową

Manufacture of two-layer castings using Fe base heat-resistant alloys

Cyclic oxidation of palladium modified and nonmodified aluminide coatings deposited on nickel base superalloys

Investigation of casting–ceramic shell mold interface thermal resistance during solidification process of nickel based superalloy

Subgrain boundaries in single crystal blade airfoil of aircraft engine

Microstructural characterization of creep in the single crystal superalloy CMSX–4

The application of tumble finishing in surface preparation process for deposition of TBC coatings

Numerical Simulation of Directional Solidification Process of Single Crystal Ni- Based Superalloy Casting

The Precipitation Processes and Mechanical Properties of Aged Inconel 718 Alloy after Annealing

External force field during diffusion : sedimentation in condensed matter

Laser Surfacing of Superalloy Inconel 738LC-Based Alloy Stellite 694 – Overlay Weld Imperfections

The influence of H2/HCL ratio on aluminizing by CVD method

Strain distribution of aircraft engine compressor blade surface applying numerical and experimental methods

Comparison of aircraft engine compressor blade finite life fatigue strength determination methods

Oxide scale formation on in 792 at early stages of high temperature exposure

Numerical vibration analysis of turbine engine compressor blades depending on geometry and position of the damage

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