Mechanical properties of a forged Fe-25Al-2Ta steam turbine blade

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F10%3A%230001598" target="_blank" >RIV/46747885:24210/10:#0001598 - 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

Mechanical properties of a forged Fe-25Al-2Ta steam turbine blade

Popis výsledku v původním jazyce

The mechanical properties of samples taken from different parts of a 650 mm long steam turbine blade forged fromFe?25Al?2Ta(in at.%)by conventionalforging on acounter blow hammer were examined. The hardness, brittle-to-ductile transition temperatures (BDTT), theyield stress in compression and in tension, and the creep behaviour were studied and compared with the same material in the as-cast and heat-treated state.Though forging apparently improves the mechanical properties they are still not optimal because of a too large grain size which stems from the insufficiently refined microstructure in the cast precursors. Because some distinct features were observed during creep testing, microstructures of crept samples were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM).These investigations revealed that the increased creep resistance below 700 oC is caused by crystallographically oriented sub-micron sized precipitates of a Heusler phase.

Název v anglickém jazyce

Mechanical properties of a forged Fe-25Al-2Ta steam turbine blade

Popis výsledku anglicky

The mechanical properties of samples taken from different parts of a 650 mm long steam turbine blade forged fromFe?25Al?2Ta(in at.%)by conventionalforging on acounter blow hammer were examined. The hardness, brittle-to-ductile transition temperatures (BDTT), theyield stress in compression and in tension, and the creep behaviour were studied and compared with the same material in the as-cast and heat-treated state.Though forging apparently improves the mechanical properties they are still not optimal because of a too large grain size which stems from the insufficiently refined microstructure in the cast precursors. Because some distinct features were observed during creep testing, microstructures of crept samples were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM).These investigations revealed that the increased creep resistance below 700 oC is caused by crystallographically oriented sub-micron sized precipitates of a Heusler phase.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GP106%2F08%2FP005" target="_blank" >GP106/08/P005: Úprava vysokoteplotních creepových vlastností aluminidů železa typu Fe3Al aditivy</a><br>

Návaznosti

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

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Intermetallics

ISSN

0966-9795

e-ISSN

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Svazek periodika

18

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

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Kód UT WoS článku

000279568600025

EID výsledku v databázi Scopus

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