Wyniki wyszukiwania - BazTech

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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

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2009

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z. 95

67-68

2

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

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2008

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z. 92

69-69

3

Porovnání mikrostrukturních změn slitiny hliníku AlSi7Mg0,6 při různých ochlazovacích rychlostech

Juliš M., Podrábský T.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

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2008

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z. 92

71-71

4

Image analysis for study of aluminium alloys microstructure

Juliš M., Podrábský T.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

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2007

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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.

5

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

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2007

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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.

6

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

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2004

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z. 78

27-32

7

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

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2004

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z. 78

179-184

8

Heterogenita slitiny Inconel 713 LC

Pospíšilová S., Stránský K., Podrábský T., Pantělejev L., Rek A., Dobrovská J., Juliš M.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

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2004

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z. 78

185-190

9

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

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2003

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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.