Evaluation of service-induced damage and restoration of cast turbine blades

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Journal of Materials Engineering and Performance; (United States)

DOI:https://doi.org/10.1007/BF02661742· OSTI ID:5307563

Persson, C; Persson, P O ^[1]

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1. Celsius Materialteknik, Linkoeping (Sweden)

Conventionally cast turbine blades of Inconel 713C, from a military gas turbine aircraft engine, have been investigated with regard to service-induced microstructural damage and residual creep life time. For cast turbine blades, service life is defined by statistical values. The statistical methods can prove to be uneconomical, because safe limits must be stated with regard to the statistical probability that some blades will have higher damage than normal. An alternative approach is to determine the service-induced microstructural damage on each blade, or a representative number of blades, to better optimize blade usage. Ways to use service-induced [gamma][prime] rafting and void formation as quantified microstructural damage parameters in a service lifetime prediction model are suggested. The damage parameters were quantified, in blades with different service exposure levels, and correlated to remaining creep life evaluated from creep test specimens taken from different positions of serviced blades. Results from tests with different rejuvenation treatments, including hot isostatic pressing and/or heat treatment, are discussed briefly.

• OSTI ID: 5307563
• Journal Information: Journal of Materials Engineering and Performance; (United States), Vol. 2:4; ISSN 1059-9495
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
GAS TURBINE ENGINES
TURBINE BLADES
INCONEL 718
CREEP
MICROSTRUCTURE
SERVICE LIFE
AIRFOILS
EXPERIMENTAL DATA
ALLOY-NI53CR19FE19NB5MO3
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
DATA
ENGINES
HEAT ENGINES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCONEL ALLOYS
INFORMATION
INTERNAL COMBUSTION ENGINES
IRON ALLOYS
LIFETIME
MATERIALS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM A
NUMERICAL DATA
330103* - Internal Combustion Engines- Turbine
360102 - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties