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Tytuł:
Analysis of solidification parameters and macrostructure of IN-713C castings after complex modification
Autorzy:
Binczyk, F.
Gradoń, P.
Powiązania:
https://bibliotekanauki.pl/articles/379884.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nickel alloy
superalloy
modification
inoculation
solidification
thermal analysis
macrostructure
stop niklu
nadstop
modyfikacja
inokulacja
krzepnięcie
analiza termiczna
makrostruktura
Opis:
The paper presents a research results concerning impact of volume modification (ceramic filter containning cobalt aluminate and hafnium powder) and simultaneous surface and volume modification on solidification and stereological parameters of macrostructure of castings made from post-production scrap of nickel superalloy IN-713C. Research included investigation of the influence of chemical composition on the temperature Tliq i Tsol and evaluation of following macrostructure parameters: the number of grains per mm2, average grain area and shape coefficient. Results indicate high influence of carbon content on Tliq. Macrostructure of sample castings indicate positive effect of surface and volume modification, however impact of surface modification is more pronounced.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3; 5-8
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties and creep resistance of nickel alloys after complex modification and double filtration
Autorzy:
Binczyk, F.
Gradoń, P.
Mańka, M.
Powiązania:
https://bibliotekanauki.pl/articles/382498.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nadstop niklu
makrostruktura
modyfikacja
filtracja
twardość
odporność na pełzanie
nickel superalloy
macrostructure
modification
filtration
hardness
creep behaviour
Opis:
The paper presents the results of studies to determine the effect of complex surface and bulk modification and double filtration during mould pouring on the stereological parameters of macrostructure and mechanical properties of castings made from the post-production waste IN-713C and the MAR-247 nickel alloys. The evaluation covered the number of grains per 1mm2 of the sample surface area, the average area of grains and the shape index, hardness HB, tensile strength and resistance to high temperature creep. The results indicate the possibility of controlling the stereological parameters of macrostructure through application of several variants of the modification, controlling in this way also different low- and high-temperature properties. The positive effect of double filtration of the alloy during mould pouring on the metallurgical quality and mechanical properties of castings has also been emphasized.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 5-8
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Modified Cores for Grain Refinement in Castings of Aircraft Turbine Blades
Autorzy:
Binczyk, F.
Cwajna, J.
Gradoń, P.
Powiązania:
https://bibliotekanauki.pl/articles/382651.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative casting materials
innovative casting technologies
Nickel alloy IN-713C
surface modification
turbine blades
macrostructure
innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
Stop niklu IN-713C
modyfikacja powierzchni
łopatki turbinowe
makrostruktura
Opis:
Paper presents the results of research on modified surface grain refinement method used in investment casting of hollow, thin-walled parts made of nickel based superalloys. In the current technology, the refining inoculant is applied to the surface of the wax pattern and then, it is transferred to the ceramic mould surface during dewaxing. Because of its chemical activity the inoculant may react with the liquid metal which can cause defects on the external surface of the cast part. The method proposed in the paper aims to reduce the risk of external surface defects by applying the grain refiner only to the ceramic core which shapes the internal surface of the hollow casting. In case of thin-walled parts the grain refinement effect is visible throughout the thickness of the walls. The method is meant to be used when internal surface finish is less important, like for example, aircraft engine turbine blades, where the hollowing of the cast is mainly used to lower the weight and aid in cooling during operation.
Źródło:
Archives of Foundry Engineering; 2017, 17, 3; 19-22
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ATD and DSC Analysis of IN-713C and ZhS6U-VI Superalloys
Autorzy:
Binczyk, F.
Cwajna, J.
Gradoń, P.
Powiązania:
https://bibliotekanauki.pl/articles/381895.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative casting materials
innovative casting technologies
Nickel superalloys
ATD method
DSC method
solidification parameters
innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
stopy niklu
metoda ATD
metoda DSC
parametry krzepnięcia
Opis:
Paper presents the results of ATD and DSC analysis of two superalloys used in casting of aircraft engine parts. The main aim of the research was to obtain the solidification parameters, especially Tsol and Tliq, knowledge of which is important for proper selection of casting and heat treatment parameters. Assessment of the metallurgical quality (presence of impurities) of the feed ingots is also a very important step in production of castings. It was found that some of the feed ingots delivered by the superalloy producers are contaminated by oxides located in shrinkage defects. The ATD analysis allows for quite precise interpretation of first stages of solidification at which solid phases with low values of latent heat of solidification are formed from the liquid. Using DSC analysis it is possible to measure precisely the heat values accompanying the phase changes during cooling and heating which, with knowledge of phase composition, permits to calculate the enthalpy of formation of specific phases like γ or γ′.
Źródło:
Archives of Foundry Engineering; 2017, 17, 1; 13-16
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mixture model of NMR - its application to diagnosis and treatment of brain cancer
Autorzy:
Binczyk, F.
Tarnawski, R.
Polańska, J.
Powiązania:
https://bibliotekanauki.pl/articles/229861.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
GMM
EM algorithm
BIC
NMR
Savitzky-Golay filter
Opis:
Nuclear Magnetic Resonance (NMR) is widely used technique in cancer diagnosis and treatment planning. It is employed to search for the high concentration regions of particular metabolites, which are directly related to the concentration of cancer cells. NMR signal maybe be characterized by a set of peaks which are representation of every distinct metabolite. Area under peak must be calculated in order to obtain proper information about metabolite amount. Commercially available software allows for the analysis of one-peak-in-time only. The proposed technique, based on Gaussian Mixture Model (GMM), allows for modeling all-peaks-in-time, and corrects after the neighboring peaks giving more accurate estimates of metabolite concentration. The resulting software processes NMR signal from the very beginning up to the final result, which is given in a form of so called metabolite map.
Źródło:
Archives of Control Sciences; 2010, 20, 4; 457-472
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ceramic filters for bulk inoculation of nickel alloy castings
Autorzy:
Binczyk, F.
Śleziona, J.
Gradoń, P.
Powiązania:
https://bibliotekanauki.pl/articles/379709.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nickel superalloy
ceramic filter
CoAl2O4 inoculant
compression strength
nadstop niklu
filtr ceramiczny
inokulant CoAl2O4
wytrzymałość na ściskanie
Opis:
The work includes the results of research on production technology of ceramic filters which, besides the traditional filtering function, play also the role of an inoculant modifying the macrostructure of cast nickel alloys. To play this additional role, filters should demonstrate sufficient compression strength and ensure proper flow rate of liquid alloy. The role of an inoculant is played by cobalt aluminate introduced to the composition of external coating in an amount from 5 to 10 wt.%. The required compression strength (over 1MPa) is provided by the supporting layers, deposited on the preform, which is a polyurethane foam. Based on a two-level fractional experiment 24-1, the significance of an impact of various technological parameters (independent variables) on selected functional parameters of the ready filters was determined. Important effect of the number of the supporting layers and sintering temperature of filters after evaporation of polyurethane foam was stated.
Źródło:
Archives of Foundry Engineering; 2011, 11, 3 spec.; 29-32
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of surface and volume modification of nickel superalloys IN-713C and MAR-247 on high temperature creep resistance
Autorzy:
Cieśla, M.
Binczyk, F.
Mańka, M.
Powiązania:
https://bibliotekanauki.pl/articles/380339.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nadstop niklu
makrostruktura
właściwości mechaniczne
pełzanie
nickel superalloy
macrostructure
modification
mechanical properties
creep
Opis:
Impact of surface and volume modification and double filtration during pouring the moulds on basic mechanical properties and creep resistance of nickel superalloys IN-713C and MAR-247 in conditions of accelerated creep of castings made of post-production scrap of these alloys is evaluated in this paper. The conditions of initiation and propagation of cracks in the specimens were analysed with consideration of stereological properties of material macro- and microstructure. It has been proven that in the conditions of high-temperature creep at 980 C and at stress [...] = 150 MPa, creep resistance of superalloy MAR-247 is more than 10 times higher than the creep resistance of IN-713C alloy. In case of IN-713C alloy, the creep resistance negligibly depends on macrograin sizes. But, the macrograin size considerably affects the time to failure of specimens made of alloy MAR-247. Creep resistance of specimens made of coarse grain material was 20% higher than the resistance of fine grain materials.
Źródło:
Archives of Foundry Engineering; 2012, 12, 4; 17-24
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Temperature on the Result of Complex Modification of IN-713C Superalloy Castings
Autorzy:
Binczyk, F.
Gradoń, P.
Mańka, M.
Findziński, R.
Powiązania:
https://bibliotekanauki.pl/articles/383137.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Innovative casting material
innovative casting technology
nickel alloy IN-713C
modification
cobalt aluminate
macrostructure
innowacyjny materiał odlewniczy
innowacyjna technologia odlewnicza
stop niklu IN-713C
glinek kobaltu
makrostruktura
Opis:
The paper presents the results of research on the determination of the effect of pouring temperature on the macrostructure of the castings subjected to complex (surface and volume) modification and double filtration. Tested castings were made of post-production scrap (gating system parts) of IN-713C superalloy. Tests included the evaluation of the number of grains per 1 mm2, mean grain surface area, shape factor and tensile strength. Casting temperature below 1470 °C positively influenced the modification effect. The grains were finer and the mechanical properties increased, especially for castings with thicker walls. On the other hand, manufacture of thin walled castings of high quality require pouring temperature above 1480 °C.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4; 13-16
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Casting Shrinkage and Liquid Metal Fluidity of IN-713C Alloy
Autorzy:
Binczyk, F.
Cieśla, M.
Gradoń, P.
Findziński, A.
Powiązania:
https://bibliotekanauki.pl/articles/380184.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fluidity
castability
spiral test
pouring temperature
IN713C
superalloy
silumin
płynność
lejność
temperatura odlewania
nadstop
Opis:
This paper presents the results of measurements of liquid metal fluidity and linear shrinkage of nickel alloy IN-713C in vacuum induction melting furnace Balzers VSG-2. Because of limited volume of the furnace chamber special models for technological trials were fluidity of hypoeutectic silumin, however in case of nickel superalloy the mould cavity was completely filled in each test because of high required pouring temperature. Positive results were obtained from the modified spiral test for all alloys used in the research. Relationship between the linear shrinkage for the test rod and a specific indicator of contraction defined on a spiral was observed.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1; 9-12
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of impurities in feed ingots on the quality of castings made from nickel superalloy IN-713C
Autorzy:
Binczyk, F.
Cwajna, J.
Sozańska, M.
Gradoń, P.
Powiązania:
https://bibliotekanauki.pl/articles/381414.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ATD
superalloy
feed ingot
master heat
solidification
non-metallic inclusion
nadstop
wlewek
krzepnięcie
wtrącenie niemetaliczne
Opis:
The paper presents the results of research on the impact of impurities in the feed ingots (master heat) on the precipitation of impurities in the ATD thermal analysis probe castings. This impurities occur mostly inside shrinkage cavities and in interdendritic space. Additionally, insufficient filtration of liquid alloy during pouring promotes the transfer of impurities into the casting. The technology of melting superalloys in vacuum furnace prevents the removal of slag from the surface of molten metal. Because of that, the effective method of quality assessment of feed ingots in order to evaluate the existence of impurities is needed. The effectiveness of ATD analysis in evaluation of purity of feed ingots was researched. In addition the similarities of non-metallic inclusions in feed ingots and in castings were observed.
Źródło:
Archives of Foundry Engineering; 2013, 13, 4; 5-8
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of a Structure on Durability of Modified Nickel-Base Superalloys in Creep Conditions
Wpływ struktury na trwałość w warunkach pełzania modyfikowanych nadstopów na bazie niklu
Autorzy:
Cieśla, M.
Mańka, M.
Gradoń, P.
Binczyk, F.
Powiązania:
https://bibliotekanauki.pl/articles/356799.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nickel alloys
creep
macrostructure
microstructure
modification
stopy niklu
pełzanie
makrostruktura
mikrostruktura
modyfikacja
Opis:
The study assesses the impact of surface and bulk modification and filtration during pouring on a durability under accelerated creep conditions of casts made of IN-713C and MAR-247 nickel superalloys scrap used for manufacturing of aircraft engine parts. The impact of solutionizing (1185°C/2 h) with subsequent ageing (870°C/20 h) on the creep resistance of a casting made from MAR-247 coarse-grained superalloy was also examined. Morphological structure parameters were determined with the use of Met-Ilo software. Macrostructure analysis of casts showed very significant impact of surface modification treatment. Creep test results clearly showed that coarse grained samples of IN-713C and MAR-247 superalloys have higher creep resistance. Moreover alloy MAR-247 had higher creep durability after heat treatment compared to as-cast state.
W pracy przeprowadzono ocenę wpływu zabiegów modyfikacji powierzchniowej i objętościowej oraz filtracji podczas zalewania form na trwałość w warunkach przyspieszonego pełzania odlewów wykonanych z odpadów poprodukcyjnych nadstopów niklu IN-713C i MAR-247 stosowanych na łopatki turbin silników lotniczych. Analizie poddano również wpływ operacji przesycania (1185°C/20 h) z następnym starzeniem (870°C/20 h) na trwałość pełzaniowa odlewu wytworzonego z stopu MAR-247 o strukturze gruboziarnistej. Badania makrostruktury wykonanych odlewów wykazały bardzo istotny wpływ zabiegu modyfikowania powierzchniowego. Stosując program Met-Ilo określono istotne z punktu widzenia trwałości parametry morfologiczne struktury. Próby pełzania wskazuje, że nadstopy IN-713C i MAR-247 charakteryzujace się wiekszym makroziarnem wykazywały dłuższy czas do zerwania próbki. Ponadto próbki stopu MAR-247 poddane obróbce cieplnej wykazują większą odporność na pełzanie niż próbki w stanie lanym.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 4; 1559-1563
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Relationship Between the Solidification Parameters and Chemical Composition of Nickel Superalloy IN-713C
Autorzy:
Binczyk, F.
Gradoń, J.
Cwajna, J.
Szymszal, J.
Powiązania:
https://bibliotekanauki.pl/articles/383245.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative casting materials
innovative casting technologies
nickel alloy IN-713C
thermal analysis
solidification parameters
innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
stop niklu IN-713C
analiza termiczna
parametry zestalania
Opis:
The paper presents the results of studies on the development of correlation of solidification parameters and chemical composition of nickel superalloy IN-713C, which is used i.a. on aircraft engine turbine blades. Previous test results indicate significant differences in solidification parameters of the alloy, especially the temperatures Tliq and Tsol for each batch of ingots supplied by the manufacturer. Knowledge of such a relationship has important practical significance, because of the ability to asses and correct the temperatures of casting and heat treatment of casts on the basis of chemical composition. Using the statistical analysis it was found that the temperature of the solidification beginning Tliq is mostly influenced by the addition of carbon (similar to iron alloys). The additions of Al and Nb have smaller but still significant impact. Other alloying components do not have significant effect on Tliq. The temperature Teut is mostly affected by Ni, Ti and Nb. The temperature Tsol is not in any direct correlation with the chemical composition, which is consistent with previous research. The temperature Tsol depends primarily on the presence of non-metallic inclusions present in feed materials and introduced during the melting and casting processes.
Źródło:
Archives of Foundry Engineering; 2014, 14, 4; 5-10
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Macrostructure of Nickelbased Superalloys IN713C and MAR 247 on the Characteristics of High-temperature Creep
Autorzy:
Cieśla, M.
Binczyk, F.
Mańka, M.
Findziński, R.
Powiązania:
https://bibliotekanauki.pl/articles/380019.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nickel alloy IN-713C
superalloy Mar-247
macrostructure
modification
creep
stop niklu IN-713C
nadstop Mar-247
modyfikacja
Opis:
The study consisted in assessing the influence of surface and volume modification on the characteristics of high-temperature creep of castings made of waste products of nickel-based superalloys IN 713C and the MAR-247. The results of high-temperature creep tests performed under conditions of two variants of research were analysed. The characteristics of creep according to variant I were obtained on the basis of earlier studies of these alloys with the parameters T=982oC, σ=150MPa [1]. Variant II included carrying out creep tests of alloy IN713C with the parameters T=760oC, σ =400MPa and alloy MAR247 with the parameters: T=982oC, σ=200MPa.Developed creep characteristics were compared with the results of these alloys with the parameters according to variant I of the study. It was observed that the conditions of experiments carried out depending upon the value of the creep test temperature and stress with the creep stability depends on the size of the macrograin (I variant of the studies) or such influence was not observed (II variant of the studies). Stability of samples with coarse structure in variant I of creep tests was significantly higher than the samples with fragmented grain. It was found that the observed stability conditions are dependent on the dominant deformation mechanisms under creep tests carried out - diffusion mechanism in variant I and a dislocation mechanism in variant II of the study. The conditions for the formation and growth of the cracks in the tested materials, including the morphological characteristics of their macro-and microstructure were tested.
Źródło:
Archives of Foundry Engineering; 2014, 14, 4; 11-16
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Influence of Modification and Casting Technology on Structure of IN-713C Superalloy Castings
Autorzy:
Binczyk, F.
Cwajna, J.
Gradoń, P.
Mańka, M.
Powiązania:
https://bibliotekanauki.pl/articles/381572.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative casting materials
innovative casting technologies
nickel alloy IN-713C
modification
cobalt aluminate
macrostructure
innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
stop niklu
modyfikacja
kobalt
makrostruktura
Opis:
The paper presents the results concerning impact of modification (volume and surface techniques), pouring temperature and mould temperature on stereological parameters of macrostructure in IN713C castings made using post-production scrap. The ability to adjust the grain size is one of the main issues in the manufacturing of different nickel superalloy castings used in aircraft engines. By increasing the grain size one can increase the mechanical properties, like diffusion creep resistance, in higher temperatures. The fine grained castings. on the other hand, have higher mechanical properties in lower temperatures and higher resistance to thermal fatigue. The test moulds used in this study, supplied by Pratt and Whitney Rzeszow, are ordinarily used to cast the samples for tensile stress testing. Volume modification was carried out using the patented filter containing cobalt aluminate. The macrostructure was described using the number of grains per mm2, mean grain surface area and shape index. Obtained results show strong relationship between the modification technique, pouring temperature and grain size. There was no significant impact of mould temperature on macrostructure.
Źródło:
Archives of Foundry Engineering; 2016, 16, 3; 11-14
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 19

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