Damage of Diffusion Coatings on Turbine Blades

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F11%3APU96858" target="_blank" >RIV/00216305:26210/11:PU96858 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Damage of Diffusion Coatings on Turbine Blades

Popis výsledku v původním jazyce

Nickel- and cobalt-based superalloys have been developed and are used in the hot sections of gas turbines in order to meet complex high-temperature phenomena. The gas temperature in modern engines exceeds 1650 C in the turbine section and its cooled parts reach temperatures as high as 1200 C. During operation, the structural materials degrade by fatigue, creep, oxidation, corrosion and erosive wear. Protective coatings provide barriers between the alloys and outer environment and, in particular, they enhance a resistance to oxidation and hot corrosion. The metallic coatings can be divided into two categories: diffusion and overlay coatings. Diffusion aluminide coatings (DAC) are based on the intermetallic compound beta-NiAl that forms under the influence of the substrate. Although DAC have been enjoying wide application, they have a limitation which arises from no deliberate changes of their properties to meet requirements of specific service conditions. This article is focused on a detection of damage that formed in the diffusion coatings on first stage turbine blades after two different short-term overheating events. Motivation for this study came from demands for an extension of our knowledge of degradation mechanisms. A possibility of a non-destructive assessment of the damage level using suitable damage parameters is also briefly described

Název v anglickém jazyce

Damage of Diffusion Coatings on Turbine Blades

Popis výsledku anglicky

Nickel- and cobalt-based superalloys have been developed and are used in the hot sections of gas turbines in order to meet complex high-temperature phenomena. The gas temperature in modern engines exceeds 1650 C in the turbine section and its cooled parts reach temperatures as high as 1200 C. During operation, the structural materials degrade by fatigue, creep, oxidation, corrosion and erosive wear. Protective coatings provide barriers between the alloys and outer environment and, in particular, they enhance a resistance to oxidation and hot corrosion. The metallic coatings can be divided into two categories: diffusion and overlay coatings. Diffusion aluminide coatings (DAC) are based on the intermetallic compound beta-NiAl that forms under the influence of the substrate. Although DAC have been enjoying wide application, they have a limitation which arises from no deliberate changes of their properties to meet requirements of specific service conditions. This article is focused on a detection of damage that formed in the diffusion coatings on first stage turbine blades after two different short-term overheating events. Motivation for this study came from demands for an extension of our knowledge of degradation mechanisms. A possibility of a non-destructive assessment of the damage level using suitable damage parameters is also briefly described

Druh

D - Stať ve sborníku

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

<a href="/cs/project/FR-TI1%2F099" target="_blank" >FR-TI1/099: *Výzkum a vývoj vedoucí k inovaci malých turbínových motorů.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2011 Conference Proceedings

ISBN

978-80-87294-24-6

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

840-846

Název nakladatele

Tanger sro

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

18. 5. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000302746700134