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Miniaturization of low cycle fatigue-testing of single crystal superalloys at high temperature for uncoated and coated specimens

Meid, Carla and Waedt, Uwe and Subramaniam, Anankan and Wischek, Janine and Bartsch, Marion and Terberger, Philipp and Vaßen, Robert (2019) Miniaturization of low cycle fatigue-testing of single crystal superalloys at high temperature for uncoated and coated specimens. Materialwissenschaft und Werkstofftechnik, 50 (7), pp. 777-787. Wiley. DOI: 10.1002/mawe.201800135 ISSN 0933-5137

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Abstract

A newly developed miniature specimen and respective fixture for high temperature low cycle fatigue testing of nickel based single crystal superalloys is presented. Miniaturization allows the preparation of test specimens in all main crystallographic orientations of the cubic nickel crystal using laboratory sized material samples and enables excellent utilization of the costly material. The specimen geometry is optimized by means of parameter studies employing numerical calculations such that for the main crystallographic orientations the stress concentration at the fillet between gauge length and specimen head is minimized, and failure is likely to occur within the gauge length. The designed fixture allows easy specimen mounting and provides sufficient support for applying an extensometer for strain measurement. Protective metallic coatings against oxidation can be applied on the specimen by plasma spraying for studying the effect of coatings on the fatigue lifetime. The functionality of the specimen geometry and fixture design for low cycle fatigue testing is demonstrated for temperatures up to 950 °C

Item URL in elib:https://elib.dlr.de/128746/
Document Type:Article
Title:Miniaturization of low cycle fatigue-testing of single crystal superalloys at high temperature for uncoated and coated specimens
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Meid, CarlaDLR WF (ENM)UNSPECIFIED
Waedt, UweUNSPECIFIEDUNSPECIFIED
Subramaniam, AnankanUNSPECIFIEDUNSPECIFIED
Wischek, Janinejanine.wischek (at) dlr.deUNSPECIFIED
Bartsch, MarionMarion.Bartsch (at) dlr.dehttps://orcid.org/0000-0002-3952-2928
Terberger, PhilippUNSPECIFIEDUNSPECIFIED
Vaßen, RobertFZ-JülichUNSPECIFIED
Date:July 2019
Journal or Publication Title:Materialwissenschaft und Werkstofftechnik
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:50
DOI :10.1002/mawe.201800135
Page Range:pp. 777-787
Publisher:Wiley
ISSN:0933-5137
Status:Published
Keywords:Low cycle fatigue , single crystal nickel-base superalloys, high temperature fatigue, miniaturization, specimen design
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation methods
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Experimental and Numerical Methods
Deposited By: Bartsch, Dr.-Ing. Marion
Deposited On:22 Oct 2019 14:43
Last Modified:22 Oct 2019 14:43

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