SANS investigation of ?´ precipitate morphology evolution in creep exposed single crystal nickel base superalloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F10%3A%230000223" target="_blank" >RIV/26316919:_____/10:#0000223 - 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

SANS investigation of ?´ precipitate morphology evolution in creep exposed single crystal nickel base superalloy

Popis výsledku v původním jazyce

In order to assess the material degradation of exposed gas-turbine high-temperature components, the creep degraded CMSX-4 single-crystal nickel-base superalloy of two axial orientations [001] and [111] was investigated. Constant load creep tests were conducted in the stress/temperature ranges of 250 ? 780 MPa / 750 ? 950°C resulting in rupture time variation from 50 to 4000 hours. A combination of scanning electron microscopy (SEM) and non-destructive small-angle neutron scattering method (SANS) was used to investigate the directional coarsening (rafting) of the ?' precipitates in relation to the stress and temperature applied as well as to the initial crystallographic orientation of the specimens. The SANS results are discussed in terms of the correlation with the raft development, the axial orientation of specimen, the creep parameters and the mechanical properties.

Název v anglickém jazyce

SANS investigation of ?´ precipitate morphology evolution in creep exposed single crystal nickel base superalloy

Popis výsledku anglicky

In order to assess the material degradation of exposed gas-turbine high-temperature components, the creep degraded CMSX-4 single-crystal nickel-base superalloy of two axial orientations [001] and [111] was investigated. Constant load creep tests were conducted in the stress/temperature ranges of 250 ? 780 MPa / 750 ? 950°C resulting in rupture time variation from 50 to 4000 hours. A combination of scanning electron microscopy (SEM) and non-destructive small-angle neutron scattering method (SANS) was used to investigate the directional coarsening (rafting) of the ?' precipitates in relation to the stress and temperature applied as well as to the initial crystallographic orientation of the specimens. The SANS results are discussed in terms of the correlation with the raft development, the axial orientation of specimen, the creep parameters and the mechanical properties.

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

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Materials Science Forum

ISSN

1662-9752

e-ISSN

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Svazek periodika

636-637

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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