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A small-scale creep test for calibrating an efficient lifetime model for high pressure turbine blades

Dresbach, Christian and Wischek, Janine and Bartsch, Marion and Prien, Thiemo (2022) A small-scale creep test for calibrating an efficient lifetime model for high pressure turbine blades. Materialwissenschaft und Werkstofftechnik, 53, pp. 440-448. Wiley. doi: 10.1002/mawe.202100347. ISSN 0933-5137.

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Jet engines of airplanes are designed such that in some components damage occurs and accumulates in service without being critical up to a certain level of damage. Since maintenance, repair, and component exchange are very cost-intensive, it is necessary to predict efficiently the component lifetime with high accuracy. A former developed lifetime model, based on interpolated results of aerodynamic and structural mechanics simulations, uses material parameters estimated from literature values of standard creep experiments. For improved accuracy, an experimental procedure is developed for the characterization of the short-time creep behavior, which is relevant for the operation of turbine blades of jet engines. To consider microstructural influences resulting from the manufacturing of thin-walled single crystal turbine blades, small-scale specimens from used turbine blades are extracted and tested in short- and medium-time creep experiments. Based on experimental results and literature values, a creep model, which describes the fracture behavior for a wide range of creep loads, is calibrated and is now used for the lifetime prediction of turbine blades under real loading conditions.

Item URL in elib:https://elib.dlr.de/189720/
Document Type:Article
Title:A small-scale creep test for calibrating an efficient lifetime model for high pressure turbine blades
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Dresbach, ChristianHochschule Bonn-Rhein-Sieg (H-BRS)UNSPECIFIEDUNSPECIFIED
Bartsch, MarionUNSPECIFIEDhttps://orcid.org/0000-0002-3952-2928UNSPECIFIED
Prien, ThiemoLufthansa Technik AG, HamburgUNSPECIFIEDUNSPECIFIED
Date:April 2022
Journal or Publication Title:Materialwissenschaft und Werkstofftechnik
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 440-448
Keywords:Nickel-based superalloy / lifetime prediction / creep / gas turbine blade / mechanical testing
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Advanced Materials and New Manufacturing Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Experimental and Numerical Methods
Institute of Materials Research > Mechanical Testing of Materials
Deposited By: Bartsch, Dr.-Ing. Marion
Deposited On:28 Nov 2022 10:04
Last Modified:28 Nov 2022 10:04

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