Autor: Roskosz, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Quantitative Evaluation of Porosity in Turbine Blades Made of IN713C Superalloy After Hot Isostatic Pressing
Autorzy:: Roskosz, S.
Powiązania:: https://bibliotekanauki.pl/articles/355974.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: superalloys
turbine blades
hot isostatic pressing
porosity
Opis:: The aim of this paper is an assessment of the influence of hot isostatic pressing treatment on porosity of cast samples - turbine blades and vane clusters made of the IN713C superalloy. Two variants of HIP treatments, differing in pressure from each other, have been used. The quantitative evaluation of the porosity was performed using light microscopy and quantitative metallography methods. The use of the hot isostatic pressing significantly decreased the volume fraction and size of pores in the test blades, the remaining pores after the HIP process being characterized by a round shape. The increased pressure has caused significant reductions in the area fraction and size of the pores.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 1; 253-258
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Evaluation of Carbides in Turbine Blade Made of IN713C Superalloy After Hot Isostatic Pressing
Autorzy:: Kościelniak, B.
Roskosz, S.
Cwajna, J.
Powiązania:: https://bibliotekanauki.pl/articles/351248.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: IN713C superalloy
hot isostatic pressing
turbine blades
qualitative and quantitative analysis of carbides
Opis:: The IN713C is nickel-based superalloy, used to produce low pressure turbine blades in a process of investment casting. However, porosity which is formed during the casting, decreases mechanical properties of IN713C. Therefore, to eliminate porosity, a process of hot isostatic pressing was applied. Nonetheless, HIP also least to some changes in the microstructure of tested material. The main aim of this paper is to characterize the morphology of carbides before and after hot isostatic pressing. Microstructural characterization was carried out with the use of a scanning electron microscope equipped with an energy dispersive X-ray spectrometer and an electron backscatter diffraction detector. The size and shape of carbides were evaluated by quantitative metallography methods methods. The results show that the amount, size and heterogeneity of arrangement of the carbides increased after application of HIP treatment.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 1; 247-252
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Characterizing the effects of hot isostatic pressing on IN713C superalloy blade microstructure by electron backscatter diffraction
Autorzy:: Chmiela, B.
Kościelniak, B.
Roskosz, S.
Powiązania:: https://bibliotekanauki.pl/articles/1075636.pdf
Data publikacji:: 2016-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.66.Dk
07.20.Pe
81.40.Vw
61.05.jd
Opis:: The integrity of turbine blades is essential for the safe operation of jet engines. Thus, the mechanical properties, especially creep resistance and fatigue strength at high temperatures, must be thoroughly optimized. In particular, it has previously been observed that the mechanical properties of blades depend on the microstructure and porosity resulting from the casting process. To decrease the internal porosity generated by investment casting, hot isostatic pressing can be applied. This paper aims to evaluate the effects of hot isostatic pressing on the microstructure of IN713C alloy blades. Two variants of hot isostatic pressing treatment, differing in pressure, were carried out, and each resulted in lowered porosity. Microstructural investigations, performed using scanning electron microscopy and electron backscatter diffraction revealed significant changes of γ' particles and high strain intensity in the surface layer of the blades after hot isostatic pressing treatment.
Źródło:: Acta Physica Polonica A; 2016, 130, 4; 1097-1099
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Evaluation of metallurgical quality of master heat IN-713C nickel alloy ingots
Autorzy:: Binczyk, F.
Cwajna, J.
Roskosz, S.
Gradoń, P.
Powiązania:: https://bibliotekanauki.pl/articles/380351.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: analiza termiczna (ATD)
nadstop niklu
krzepnięcie odlewu
wtrącenia niemetaliczne
ATD thermal analysis
nickel superalloy
master heat ingot
solidification
non-metallic inclusions
Opis:: The paper presents the results of evaluation of the metallurgical quality of master heat ingots and of the identification of non-metallic inclusions (oxides of Al., Zr, Hf, Cr, etc.), which have been found in the shrinkage cavities formed in these ingots. The inclusions penetrate into the liquid alloy, and on pouring of mould are transferred to the casting, especially when the filtering system is not sufficiently effective. The specific nature of the melting process of nickel and cobalt alloys, carried out in vacuum induction furnaces, excludes the possibility of alloy refining and slag removal from the melt surface. Therefore, to improve the quality of castings (parts of aircraft engines), it is so important to evaluate the quality of ingots before charging them into the crucible of an induction furnace. It has been proved that one of the methods for rapid quality evaluation is an ATD analysis of the sample solidification process, where samples are taken from different areas of the master heat ingot. The evaluation is based on a set of parameters plotted on the graph of the dT/dt derivative curve during the last stage of the solidification process in a range from TEut to Tsol.
Źródło:: Archives of Foundry Engineering; 2012, 12, 4; 5-10
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Digital Material Representation Model of Porous Microstructure Based on 3D Reconstruction Algorithm
Autorzy:: Madej, Ł.
Mojżeszko, M.
Chrapoński, J.
Roskosz, S.
Cwajna, J.
Powiązania:: https://bibliotekanauki.pl/articles/356105.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: 3D reconstruction
digital material representation
serial sectioning
porous microstructure
finite element method
Opis:: Development of the Digital Material Representation (DMR) model, based on 3D reconstruction algorithm and serial sectioning, is the main goal of the present paper. Details on the serial sectioning and image processing algorithms are presented first. Serial sectioning is realized on the basis of light microscopy (LM). Then concept of 3D reconstruction and developed algorithms are presented. Two approaches, based on shape coefficients and the flood fill algorithms, are developed to identify corresponding features on subsequent 2D images. Then, the interpolation algorithm to reconstruct 3D volume between 2D images is presented. Finally, obtained 3D model is an input for finite element mesh generation software for subsequent finite element calculations.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 2A; 563-569
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Applications of magnetometric sensors based on amorphous materials in diagnostics of wire ropes
Materiały amorficzne w pasywnej metodzie badań lin stalowych eksploatowanych w szybach górniczych
Autorzy:: Kwaśniewski, J.
Roskosz, M.
Witoś, M.
Molski, S.
Powiązania:: https://bibliotekanauki.pl/articles/219776.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: badania magnetyczne lin stalowych
diagnostyka
czujniki magnetometryczne
magnetic inspection of wire ropes
diagnostics
magnetometric sensors
Opis:: The study explores potential applications of magnetometric sensors based on amorphous materiale in diagnostics of wire ropes without external magnetic fields. Ready availability of magneto-impedance technology makes it suitable for innovative sensor applications, to register magnetic anomalies arising in wire ropes. These anomalies are associated with wire deformations and cracking, including cracks which do no generate air gaps encountered in compact ropes widely operated in hoisting installations in mines.
W artykule przedstawiono nowe możliwości wykorzystania, zbudowanych na bazie materiałów amorficznych, czujników magnetometrycznych w diagnostyce lin stalowych bez zastosowania zewnętrznego pola magnetycznego. Dostępność czujników magneto impedancyjnych pozwala na budowę innowacyjnych czujników pomiarowych pozwalających na rejestrowanie anomalii magnetycznych jakie pojawiają się deformacji i pęknięć drutów w tym nie generujących szczelin powietrznych z jakimi mamy do czynienia w linach kompaktowanych stosowanych powszechnie w górniczych urządzeniach szybowych.
Źródło:: Archives of Mining Sciences; 2018, 63, 1; 221-227
0860-7001
Pojawia się w:: Archives of Mining Sciences
Dostawca treści:: Biblioteka Nauki

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