SANS Investigation of Gamma Prime Precipitate Morphology Evolution in Creep Exposed Single Crystal Ni Base Superalloy

Kód výsledku v IS VaVaI

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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 Gamma Prime Precipitate Morphology Evolution in Creep Exposed Single Crystal Ni Base Superalloy

Popis výsledku v původním jazyce

The creep degraded nickel base single crystal superalloy CMSX-4 of two axial orientations [001] and [111] was investigated with aim to assess the structure degradation. Constant load creep tests were conducted in the stress/temperature ranges of 250-780MPa/750 - 50°C resulting in rupture time variation from 50 to 4000 hours. A combination of scanning elektron microscopy (SEM) and non-destructive small-angle neutron scattering method (SANS) was used to investigate the directional coarsening (rafting) ofthe gamma prime (?') 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 axialorientation of specimen, the creep parameters and the mechanical properties.

Název v anglickém jazyce

SANS Investigation of Gamma Prime Precipitate Morphology Evolution in Creep Exposed Single Crystal Ni Base Superalloy

Popis výsledku anglicky

The creep degraded nickel base single crystal superalloy CMSX-4 of two axial orientations [001] and [111] was investigated with aim to assess the structure degradation. Constant load creep tests were conducted in the stress/temperature ranges of 250-780MPa/750 - 50°C resulting in rupture time variation from 50 to 4000 hours. A combination of scanning elektron microscopy (SEM) and non-destructive small-angle neutron scattering method (SANS) was used to investigate the directional coarsening (rafting) ofthe gamma prime (?') 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 axialorientation of specimen, the creep parameters and the mechanical properties.

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

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

0255-5476

e-ISSN

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Svazek periodika

-

Číslo periodika v rámci svazku

636-637

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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