PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 30

Liczba wyników na stronie
first rewind previous Strona / 2 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 2 next fast forward last
1
Únavové vlastnosti hořčíkové slitiny AZ91
Němcová A., Zapletal J., Podrábský T.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2009
|
z. 95
65-66
2
Únavové vlastnosti hořčíkové slitiny AZ31 + 0,15 % Ca
Gejdoš P., Zapletal J., Podrábský T.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2009
|
z. 95
63-64
3
Únavové chování a mechanismy únavového poškození niklové superslitiny inconel 713LC za teploty 800C
Pospíšilová S., Juliš M., Smékalová J., Novotná E., Podrábský T.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2009
|
z. 95
67-68
4
Vývoj mikrostruktury slitiny AZ31 při deformaci vysokou rychlostí
Man O., Šlais M., Forejt M., Podrábský T.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2008
|
z. 92
75-76
5
Vliv povrchové vrstvy Al-Si na nízkocyklovou únavu superslitiny IN713LC při teplotě 800°C
Juliš M., Obrtlík K., Podrábský T.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2008
|
z. 92
69-69
6
Únavové vlastnosti hořčíkové slitiny AZ31
Zapletal J., Gejdoš P., Podrábský T., Věchet S.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2008
|
z. 92
83-84
EN
Magnesium alloys are desirable for their low densities and high specific strength to structural use. That is why determining of fatigue properties magnesium alloys are desirable. Here was examined fatigue properties on squeeze casting magnesium alloy AZ31 with 0.5 wt% Ca.
7
Porovnání mikrostrukturních změn slitiny hliníku AlSi7Mg0,6 při různých ochlazovacích rychlostech
Juliš M., Podrábský T.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2008
|
z. 92
71-71
8
Influence of homogenizing on structure and mechanical properties of AZ91 alloy
Němcová A., Zapletal J., Podrábský T., Provazníková A., Věchet S.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2008
|
z. 92
77-78
EN
This paper deals with the influence of homogenizing on mechanical properties of magnesium alloy AZ91. The experimental material was made squeeze casting. Results of tensil test of the sample without heat treatment and samples with homogenizing (405°C/5, 10, 15 and 24 hours) were compared. To study of microstructure light microscopy was used.
9
Vliv hydraulických podmínek proudění taveniny oceli na účinnost filtrace keramickými filtry
Stránský K., Bažan J., Dobrovská J., Belko J., Podrábský T., Glownia J.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2007
|
Vol. 321, z. 89
43-44
10
Kvantitativní hodnocení degradace struktury niklových superslitin pomocí obrazové analýzy
Němec K., Podrábský T., Věchet S.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2007
|
Vol. 321, z. 89
35-35
EN
Nickel-base superalloys, strengthened by the ´ phase dispersion, presents the typical precipitation strengthened alloys. In creep testing conditions, particles of secondary phase can be effectively blocks of dislocations movement at high temperatures as well. However, particles must be sufficiently stable with respect to coalescence, it means the average distance between them increases very slowly during creep. The aim of this work is the study of structural changes of the material Inconel 7I3 LC by image analysis. It is focused on short-time creep tests at temperatures 850°C and 950°C.
11
Image analysis for study of aluminium alloys microstructure
Juliš M., Podrábský T.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2007
|
Vol. 321, z. 89
25-25
EN
The mechanical properties of parts prepared by casting are dependent mainly on their microstructure. Grains size, size of dendrites and dimensions, shape and quantity of structural defects has important influence on final mechanical properties of these parts. Image analysis is an appropriate tool which can be use for qualitatively and quantitatively materials microstructure characterization [1,2]. The aim of this study was use an image analysis (Olympus AnalySIS Five) to evaluation of cooling speed influence on aluminium alloy AlSi7Mg0,6 (trade description – Anticorodal 72 [3]) microstructure. Structural parameters (DAS and porosity) were obtained by this method.
12
Effect of different heat treatment on mechanical characteristics of aluminium alloy A357
Fiedler L., Juliš M., Vlach B., Podrábský T.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2007
|
Vol. 321, z. 89
19-19
EN
The cast aluminium alloy A357 has been widely used in aircraft industry. Particularly, due to well known performance characteristics of aluminium alloys like strength/weight ratio (specific strength). This contribution deals with the effect of different heat treatment on mechanical characteristics of A357 cast aluminium alloy. As relevant parameters were chosen yield strength, ultimate strength, elongation and hardness. The material parameters were obtained using standard tensile test method and hardness measuring. Finally the obtained values of mechanical characteristics were compared with results which were publicized in literature.
13
Chování ochranných vrstev tvořených nanášením hliníku a křemíku na niklové superslitiny
Pospíšilová S., Podrábský T.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2007
|
Vol. 321, z. 89
39-39
EN
High-temperature constructional parts of aircraft engines and energy units are exposed to high dynamic stress (fatigue processes and creep) and various temperatures in dioxide-corrosion condition (hot corrosion, oxidation and erosion). The improvement of aero-engine and turbine efficiency is possible through the increase of temperature in front of turbine. This requires the use of heat-resistant and creep-resistant materials, especially nickel-base superalloys which resist mentioned effects for a limited period of time. A deposition of protective layers should improve hot corrosion resistance. This paper is focused on micro structure of protective layers created by co-deposition of Al and Si on nickel - base superalloys INCO 713 LC and INCO 738 LC after thermal and thermal-stress exposition and on microstructure of basic materials (substrates). The contribution also shows creep tests results for both superalloys with and without a protective layer.
14
Vliv provozu na strukturu lopatky plynové turbiny ze slitiny ŽS6K
Němec K., Podrábský T., Hakl J., Vlasák T., Man O.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2004
|
z. 78
173-178
15
Statistické zhodnocení četnosti slévárenských vad v odlitcích ze slitiny Inconel 713 LC
Podrábský T., Stránský K., Hrbáček K., Pospíšilová S., Juliš M.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2004
|
z. 78
27-32
16
Mikrostrukturní změny turbínového kola ze slitiny Inconel 713 LC
Podrábský T., Juliš M., Pospíšilová S., Němec K., Janová D., Skočovský P., Hrbáček K.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2004
|
z. 78
179-184
17
Heterogenita slitiny Inconel 713 LC
Pospíšilová S., Stránský K., Podrábský T., Pantělejev L., Rek A., Dobrovská J., Juliš M.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2004
|
z. 78
185-190
18
Content available remote Degradacja w wyniku eksploatacji warstwy aluminiowo-krzemowej łopatek turbinowych wykonywanych na bazie Ni
Skočovský P., Podrábský T., Belan J.
Archiwum Technologii Maszyn i Automatyzacji
|
2004
|
Vol. 24, nr 1
45-52
PL
W artykule przedstawiono badania struktury łopatek silnika samolotowego, które wyprodukowano z nadstopu niklu ŻS6K i w celu zwiększenia żaroodporności pokryto warstwą alumi-niowo-krzemową. Na podstawie analizy metalograficznej i mikroanalizy składu chemicznego poszczególnych warstw opisano zmiany zachodzące w warstwie aluminiowo-krzemowej podczas eksploatacji silnika samolotowego (do 2000 h).
EN
The paper deals with structure of jet engine DV-2 blades, which are made from Ni-base su-peralloy ŻS6K and for increasing of a high - resistant are covered by protective alitize layer. There have been described the changes that occurred in this alitize layer during working of jet engine (till 2000 h. of operation), based on metallographic analyses and micro analyses of single layer's chemical composition.
19
Vliv chemického složení na parametry meze pevnosti při tečení slitiny in 713 LC
Podrábský T., Hrbáček K., Dobrovská J., Němec K., Stránský K.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2003
|
z. 76
195-204
20
The influence comparison of creep testing and air traffic on microstructure of cast Ni - base superalloy inconel 713 LC
Němec K., Podrábský T., Věchet S., Juliš M., Pospíšilová S.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
|
2003
|
z. 76
177-182
EN
In the working conditions of the jet engines gas turbines of supersonic plane blades are loaded by the cycles, this process is the function of the time, temperature and stress. The blade are exposed to influence of degradable processes namely of the high-temperature corrosion, fatigue process and creep. As the result of short overloading as it happens for instance during the starts and landing, eventually in some other irregularities of the jet engine function, the increase of stress and temperature leads to the changes of microstructure and properties. The presented work is aimed at the study of structural changes of the material Inconel 7I3 LC subjected to short-time creep tests at s = 180 MPa and temperature 900°C and after air traffic. The thesis is a part of a complex project aimed at study of mechanical-structural characteristics of the polycrystalline nickel-base super alloy.
first rewind previous Strona / 2 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.