NickelMaghrebV1, Main, Exploration, bibRecord, 000595

Competition between three damaging mechanisms in the fractured surface of an Inconel 713 superalloy

Identifieur interne : 000595 ( Main/Exploration ); précédent : 000594; suivant : 000596

Competition between three damaging mechanisms in the fractured surface of an Inconel 713 superalloy

Auteurs : N. Boutarek [Algérie] ; D. Saidi [Algérie] ; M. A. Acheheb [France] ; M. Iggui [Algérie] ; S. Brutefaïa [Algérie]

Source :

Materials characterization [ 1044-5803 ] ; 2008.

RBID : Pascal:08-0336109

Descripteurs français

Pascal (Inist)
- Endommagement, Mécanisme, Rupture, Surface rupture, Inconel, Alliage base nickel, Superalliage, Application, Aube turbine, Turbine, Propagation fissure, Propriété mécanique.
Wicri :
- topic : Turbine.

English descriptors

KwdEn :
- Application, Crack propagation, Damage, Fracture surfaces, Inconel alloys, Mechanical properties, Mechanism, Nickel base alloys, Ruptures, Superalloys, Turbine blades, Turbines.

Abstract

This study focuses on the characterization and examination of the fracture mechanisms acting simultaneously on the fractured surface of a nickel-based Inconel 713 superalloy gas turbine blade. This objective is reached using a variety of experimental approaches to determine the material's properties (chemical composition, morphology and crystalline structure) and the microscopic observation of the fractured surface. Major morphological variations are observed (microfacets, microcupules and streaks). Correlations have been established leading to the conclusion that three competing fracture mechanisms are involved. The main fracture mechanism is intergranular thermo-mechanical fatigue starting at the border of the blade. However, intragranular fracture by stress corrosion under load, and intergranular fracture by creep are also operative simultaneously in the center of the observed surface. Various explanations for the premature fracture behaviour of the turbine blade are discussed.

Affiliations:

Algérie, France
Grand Est, Lorraine (région), Wilaya d'Alger
Alger, Nancy

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Le document en format XML

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<term>Fracture surfaces</term>
<term>Inconel alloys</term>
<term>Mechanical properties</term>
<term>Mechanism</term>
<term>Nickel base alloys</term>
<term>Ruptures</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Endommagement</term>
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<term>Alliage base nickel</term>
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<term>Application</term>
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<term>Propagation fissure</term>
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<front><div type="abstract" xml:lang="en">This study focuses on the characterization and examination of the fracture mechanisms acting simultaneously on the fractured surface of a nickel-based Inconel 713 superalloy gas turbine blade. This objective is reached using a variety of experimental approaches to determine the material's properties (chemical composition, morphology and crystalline structure) and the microscopic observation of the fractured surface. Major morphological variations are observed (microfacets, microcupules and streaks). Correlations have been established leading to the conclusion that three competing fracture mechanisms are involved. The main fracture mechanism is intergranular thermo-mechanical fatigue starting at the border of the blade. However, intragranular fracture by stress corrosion under load, and intergranular fracture by creep are also operative simultaneously in the center of the observed surface. Various explanations for the premature fracture behaviour of the turbine blade are discussed.</div>
</front>
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Competition between three damaging mechanisms in the fractured surface of an Inconel 713 superalloy

Competition between three damaging mechanisms in the fractured surface of an Inconel 713 superalloy

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri