Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "nadstop" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 23
Tytuł:
The influence of interrupting the brazing process of Hastelloy X superalloy on the properties of the joint
Autorzy:
Krystek, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/2032796.pdf
Data publikacji:
2021
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
vacuum brazing
Hastelloy X
nickel superalloy
lutowanie próżniowe
nadstop niklu
Opis:
In this paper, disruption of brazing process impact on behavior of filler metal and properties of the joint was investigated. Hastelloy X sheet samples were brazed using Ni-13Cr-4Fe-4Si-2,7B filler alloy. Two identical sets of samples were heated in high vacuum, once load reached specified temperature process was interrupted. Subsequently, one set of samples was tested and second set was subjected to rebrazing in proper time and temperature, dedicated for used filler material. Disruption of the process in following temperature was analyzed: 930, 960, 1050, 1127, 1145, 1170°C. After both processes macroscopic observations of joint, peel test, static tensile test and spreadability analysis were carried out.
Źródło:
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika; 2021, z. 93 [302]; 31-40
0209-2689
2300-5211
Pojawia się w:
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
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:
Wear and surface characteristics on tool performance with CVD coating of Al2O3/TiCN inserts during machining of Inconel 718 alloys
Autorzy:
Agari, Shailesh Rao
Powiązania:
https://bibliotekanauki.pl/articles/2065755.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chip morphology
tool wear
surface roughness
superalloy
Inconel 718
zużycie narzędzia
chropowatość powierzchni
nadstop
Opis:
The Inconel 718 alloys, which are primarily temperature resistant, are widely used in aviation, aerospace and nuclear industries. The study on dry cutting processes for this alloy becomes difficult due to its high hardness and low thermal conductivity, wherein, most of the heat transfers due to friction are accumulated over the tool surface. Further, several challenges like increased cutting force, developing high temperature and rapid tool wear are observed during its machining process. To overcome these, the coated tool inserts are used for machining the superalloys. In the present work, the cemented carbide tool is coated with chemical vapor deposition multi-layering Al 2O 3/TiCN under the dry cutting environment. The machining processes are carried out with varying cutting speeds: 65, 81, 95, and 106 m/min, feed rate 0.1 mm/rev, and depth of cut 0.2 mm. The variation in the cutting speeds can attain high temperatures, which may activate built-up-edge development which leads to extensive tool wear. In this context, the detailed chip morphology and its detailed analysis are carried out initially to understand the machining performance. Simultaneously, the surface roughness of the machined surface is studied for a clear understanding of the machining process. The potential tool wear mechanism in terms of abrasion, adhesion, tool chip off, delaminating of coating, flank wear, and crater wear is extensively identified during the processes. From the results, it is observed that the machining process at 81 m/min corresponds to a better machining process in terms of lesser cutting force, lower cutting temperature, better surface finish, and reduced tool wear than the other machining processes.
Źródło:
Archive of Mechanical Engineering; 2022, LXIX, 1; 59--75
0004-0738
Pojawia się w:
Archive of Mechanical 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:
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:
Water vapour effect on high temperature oxidation behaviour of superalloy Rene 80
Wpływ pary wodnej na proces utleniania wysokotemperaturowego nadstopu niklu Rene 80
Autorzy:
Nowak, W. J.
Wierzba, P.
Naumenko, D.
Quadakkers, W.J.
Sieniawski, J.
Powiązania:
https://bibliotekanauki.pl/articles/176013.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
superalloy Rene 80
high temperature oxidation
water vapour
nadstop niklu Rene 80
korozja wysokotemperaturowa
para wodna
Opis:
The commercial Ni-base superalloy Rene 80 was isothermally oxidized at 1050°C in synthetic air and synthetic air with addition of H2O in two types of experiments: during oxidation in a thermobalance for 50 h and during oxidation in a tube furnace. During thermobalance oxidation the water vapour content was 7% while during tube furnace oxidation 20%. The samples were exposed up to 100 hours. The obtained results revealed that Rene 80 formed the oxide scale consisting of TiO2 and Cr2O3 in the outer and BCrO3 in the inner part of the oxide scale. Below the latter oxides internal Al2O3 precipitates are visible. Such an oxide scale morphology was observed on samples exposed in both atmospheres. For material oxidised in dry synthetic air an additional phase, namely TiN below the zone of internal oxidation of aluminium was found for all of the times. The internal TiN phase was supressed due to the presence of water vapour in the atmosphere. The obtained results showed that such a suppression is observed up to at least 100 hours.
W pracy przedstawiono wyniki badań kinetyki procesu utleniania wysokotemperaturowego nadstopu niklu Rene 80 w temperaturze 1050°C i w czasie 100 h, w środowisku syntetycznego powietrza z i bez dodatku pary wodnej. Do utleniania stosowano dwa rodzaje pieców: komorowy – próba termograwimetryczna i piec rurowy. Przyjęto zawartość pary wodnej w powietrzu syntetycznym podczas próby w komorze termograwimetrycznej – 7%, natomiast w piecu rurowym 20%. Analiza wyników badań składu chemicznego metodami emisyjnej spektroskopii optycznej z wyładowaniem jarzeniowym (GD-OES) i skaningowej mikroskopii elektronowej (SEM) na przekroju warstwy utlenionej wykazała, że na podłożu nadstopu niklu Rene 80 tworzy się wielostrefowa zgorzelina złożona z tlenków TiO2 i Cr2O3 w strefie zewnętrznej oraz tlenek BCrO3 w strefie wewnętrznej. Poniżej warstwy wierzchniej zgorzeliny stwierdzono strefy wydzieleń nieciągłych tlenku Al2O3. Przedstawiona morfologia zgorzeliny jest charakterystyczna dla utleniania w obydwu atmosferach zarówno dla powietrza syntetycznego, jak również powietrza z parą wodną. Stwierdzono, że podczas utleniania w powietrzu syntetycznym (bez pary wodnej) tworzą się azotki TiN poniżej warstwy tlenku Al2O3. Azotki TiN nie wytworzyły się w warstwie utlenianej w atmosferze pary wodnej. Jest to spowodowane preferencyjną adsorpcją cząstek pary wodnej na powierzchni zgorzeliny.
Źródło:
Advances in Manufacturing Science and Technology; 2016, 40, 2; 41-52
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
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:
Kinetics of Grain Growth in 718 Ni-Base Superalloy
Kinetyka wzrostu ziaren w nadstopie niklu 718
Autorzy:
Huda, Z.
Zaharinie, T.
Metselaar, H. S. C.
Ibrahim, S.
Min, Goh J.
Powiązania:
https://bibliotekanauki.pl/articles/352555.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nickel-base superalloy
microstructures
grain growth
kinetics
activation energy
nadstop niklu
mikrostruktura
wzrost ziaren
kinetyka
energia aktywacji
Opis:
The Haynes® 718 Ni-base superalloy has been investigated by use of modern material characterization, metallographic and heat treatment equipment. Grain growth annealing experiments at temperatures in the range of 1050 – 1200 oC (1323–1473K) for time durations in the range of 20 min-22h have been conducted. The kinetic equations and an Arrhenius-type equation have been applied to compute the grain-growth exponent n and the activation energy for grain growth, Qg, for the investigated alloy. The grain growth exponent, n, was computed to be in the range of 0.066-0.206; and the n values have been critically discussed in relation to the literature. The activation energy for grain growth, Qg, for the investigated alloy has been computed to be around 440 kJ/mol; and the Qg, data for the investigated alloy has been compared with other metals and alloys and ceramics; and critically analyzed in relation to our results.
Nadstop na bazie niklu Haynes ® 718 badano przy użyciu nowoczesnych urządzeń do charakterystyki materiałów, metalografii i obróbki cieplnej. Przeprowadzono badania wzrostu ziarna podczas wyżarzania w zakresie temperatur 1050 - 1200 ° C (1323-1473K) w czasie trwania od 20 minut do 22 godzin. Równania kinetyczne i równanie typu Arrheniusa zostały zastosowane do obliczania wykładnika wzrostu ziarna n oraz energii aktywacji wzrostu ziarna, Qg, dla badanego stopu. Obliczona wartość wykładnika wzrostu ziarna, n, mieści się w zakresie od 0.066 do 0.206 i została krytycznie przedyskutowana w odniesieniu do literatury. Obliczona energia aktywacji wzrostu ziaren, Qg, wynosi dla badanego stopu na około 440 kJ / mol. Dane Qg dla badanego stopu porównywano z danymi dla innych metali, stopów i ceramiki oraz krytycznie analizowano w odniesieniu do naszych wyników.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 3; 847-852
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractography analysis of Inconel 718 fatigued at 700°C
Autorzy:
Jambor, M.
Belan, J.
Bokuvka, O.
Novy, F.
Powiązania:
https://bibliotekanauki.pl/articles/111594.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
Inconel 718
high temperature fatigue
fractography analysis
zmęczenie cieplne
nadstop na bazie niklu
analiza fraktograficzna
odkształcenia plastyczne
Opis:
This work deals with the fractography analysis of nickel-base superalloy Inconel 718 fatigued at 700°C in air atmosphere in the high cycle region. During cyclic loading of this alloy at high temperatures some different mechanisms compared to cyclic loading at ambient temperature take place. Cyclic plastic deformation at high temperatures causes some structural changes, which could have some influence.
Źródło:
Production Engineering Archives; 2016, 13, 4; 20-25
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Degradation of Creep Resistant Ni - alloy During Aging at Elevated Temperature Part II: Structure Investigations
Autorzy:
Kaczorowski, M.
Skoczylas, P.
Krzyńska, A.
Powiązania:
https://bibliotekanauki.pl/articles/381511.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ni-base superalloy
structure investigations
SEM observation
TEM observation
nadstop niklu
badanie struktury
obserwacja SEM
obserwacja TEM
Opis:
The results of structure observations of Ni base superalloy subjected to long-term influence of high pressure hydrogen atmosphere at 750K and 850K are presented. The structure investigation were carried out using conventional light-, scanning- (SEM) and transmission electron microscopy (TEM). The results presented here are supplementary to the mechanical studies given in part I of this investigations. The results of study concerning mechanical properties degradation and structure observations show that the differences in mechanical properties of alloy subjected different temperature are caused by more advanced processes of structure degradation during long-term aging at 850K, compare to that at 750K. Higher service temperature leads to formation of large precipitates of δ phase. The nucleation and growth of needle- and/or plate-like, relative large delta precipitates proceed probably at expense strengthening γ" phases. Moreover, it can't be excluded that the least stable γ" phase is replaced with more stable γ' precipitates. TEM observations have disclosed differences in dislocation structure of alloy aged at 750K and 850K. The dislocation observed in alloy subjected to 750K are were seldom observed only, while in that serviced at high stress and 850K dislocation array and dislocation cell structure was typical.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4; 45-50
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
Oxide scale formation on in 792 at early stages of high temperature exposure
Warstwa tlenkowa na podłożu nadstopu IN 792 w początkowym stadium procesu utleniania wysokotemperaturowego
Autorzy:
Nowak, W. J.
Wierzba, P.
Wierzba, B.
Sieniawski, J.
Powiązania:
https://bibliotekanauki.pl/articles/175976.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high temperature oxidation
Ni-base superalloy IN 792
oxidation kinetics
korozja wysokotemperaturowa
nadstop niklu IN 792
kinetyka utleniania
Opis:
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 that the alloy forms multiphase oxide scale consisting of TiO2, Cr2O3, TiTaO4 and Al2O3. The latter caused Al-depletion from the bulk material, which resulted in dissolution of the γ’ phase and local weakening of the IN 792.
W pracy przedstawiono analizę wyników próby utleniania wysokotemperaturowego nadstopu niklu IN 792 w temperaturze 1050°C, w czasie 50 h w atmosferze Ar+O2 (20%). Określono kinetykę procesu utleniania oraz scharakteryzowano wytworzoną warstwę tlenków. Analizę składu chemicznego prowadzono metodami emisyjnej spektroskopii optycznej z wyładowaniem jarzeniowym (GD-OES) i elektronowej mikroskopii skaningowej (SEM). Stwierdzono, że na podłożu nadstopu niklu IN 792 tworzy się wielowarstwowa zgorzelina złożona z tlenków TiO2, Cr2O3, TiTaO4 i Al2O3. Wykazano również, że tworzenie się wydzieleń Al2O3 powoduje lokalne zubożenie ziarn osnowy stopu w aluminium – składnika fazy umacniającej (Ni3Al). Prowadzi więc do degradacji tego składnika fazowego mikrostruktury i obniżenia stopnia umocnienia nadstopu IN 792.
Źródło:
Advances in Manufacturing Science and Technology; 2017, 41, 1; 65-74
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The control of solidification kinetics of the vacuum-cast thin-wall nickel-based superalloys by changing the geometrical characteristics of the ceramic mold
Autorzy:
Cygan, R.
Szeliga, D.
Rokicki, P.
Sieniawski, J.
Suchy, J. S.
Powiązania:
https://bibliotekanauki.pl/articles/381982.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nickel based superalloy
ceramic mold
thin walled casting
investment casting
nadstop niklu
forma ceramiczna
odlewanie cienkościenne
odlewanie precyzyjne
Opis:
This paper provides an analysis of experimental research and results of investment casting process. Temperature field in a ceramic mold is one of the problems during numerical simulation. Reducing the costs of production in precision casting involves the reduction of scraps, which is one of the fundamental problems of the foundry industry. Reducing these costs is associated with optimization of precision casting technology of aircraft engines critical parts, including control of the solidification front in thin-walled castings of nickel super alloys cast in a vacuum. It is achieved by changing the geometrical characteristics of the ceramic mold. The results of the tests were used to optimize the industrial production of aircraft components in Precision Foundry of WSK Rzeszów. Temperature distribution gained in the conducted tests allowed verification and optimization of computer simulations.
Źródło:
Archives of Foundry Engineering; 2013, 13, 4; 21-28
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:
Phase Transformations in Nickel base Superalloy Inconel 718 during Cyclic Loading at High Temperature
Autorzy:
Jambor, M.
Bokuvka, O.
Novy, F.
Trsko, L.
Belan, J.
Powiązania:
https://bibliotekanauki.pl/articles/111867.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
nickel base superalloy
Inconel 718
phase transformations
high temperature fatigue
nadstop na bazie niklu
przemiany fazowe
zmęczenie cieplne
zmęczenie materiału
Opis:
Nickel base superalloys are hi-tech materials intended for high temperature applications. This property owns a complex microstructure formed by matrix of Ni and variety of precipitates. The type, form and the amount of these phases significantly affect the resulting properties of these alloys. At sufficiently long exposure to high temperatures, the transformation phase can occur, which can lead to degradation of properties of these alloys. A cyclic plastic deformation can accelerate these changes, and they could occur at significantly lower temperatures or in shorter time of exposure. The aim of this study is to describe phase transformation, which can occur by a cyclic plastic deformation at high temperatures in nickel base superalloy Inconel 718.
Źródło:
Production Engineering Archives; 2017, 15; 15-18
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 23

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies