Autor: Ciesla, M - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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

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Skocz do pozycji: 2.

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=982^oC, σ=150MPa [1]. Variant II included carrying out creep tests of alloy IN713C with the parameters T=760^oC, σ =400MPa and alloy MAR247 with the parameters: T=982^oC, 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

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Skocz do pozycji: 3.

Tytuł:: Creep Behaviour of Modified Mar-247 Superalloy
Autorzy:: Cieśla, M.
Mańka, M.
Binczyk, F.
Gradoń, P.
Powiązania:: https://bibliotekanauki.pl/articles/354216.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: nickel superalloys
creep
macrostructure
microstructre
Opis:: The paper presents the results of analysis of creep behaviour in short term creep tests of cast MAR-247 nickel-based superalloy samples made using various modification techniques and heat treatment. The accelerated creep tests were performed under temperature of 982 °C and the axial stresses of σ = 150 MPa (variant I) and 200 MPa (variant II). The creep behaviour was analysed based on: creep durability (creep rupture life), steady-state creep rate and morphological parameters of macro- and microstructure. It was observed that the grain size determines the creep durability in case of test conditions used in variant I, durability of coarse-grained samples was significantly higher.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 2A; 701-704
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

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

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Skocz do pozycji: 5.

Tytuł:: Durability of MAR-247 and IN-713C Nickel Superalloys under Cyclic Creep Conditions
Autorzy:: Cieśla, M.
Binczyk, F.
Junak, G.
Mańka, M.
Gradoń, P.
Powiązania:: https://bibliotekanauki.pl/articles/380030.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: nickel superalloy
macrostructure modification
heat treatment
low-cycle fatigue
cyclic creep
nadstop niklu
modyfikacja makrostruktury
obróbka cieplna
zmęczenie niskocyklowe
pełzanie cykliczne
Opis:: Paper presents the assessment of impact of heat treatment on durability in low-cycle fatigue conditions (under constant load) in castings made using post-production scrap of MAR-247 and IN-713C superalloys. Castings were obtained using modification and filtration methods. Additionally, casting made of MAR-247 were subjected to heat treatment consisting of solution treatment and subsequent aging. During low-cycle fatigue test the cyclic creep process were observed. It was demonstrated that the fine-grained samples have significantly higher durability in test conditions and , at the same time, lower values of plastic deformation to rupture Δ□_pl. It has been also proven that durability of fine-grained MAR-247 samples can be further raised by about 60% using aforementioned heat treatment.
Źródło:: Archives of Foundry Engineering; 2015, 15, 4; 17-20
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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