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Failure behaviour of the superalloy MAR-M247 LC under LCF, HCF and combined LCF/HCF loading

  • Domnin Gelmedin and Karl-Heinz Lang
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 103 Issue 1

Abstract

Materials for turbine blades experience in service a combined loading of low and high cycle fatigue at high temperatures. In order to understand the failure behaviour under these loading conditions, systematic investigations were carried out. Low cycle fatigue, high cycle fatigue and combined low and high cycle fatigue tests were realised on MAR-M247 LC at 650 °C in an air environment under total strain control. Surface damage and fracture surfaces were analysed. Under combined low and high cycle fatigue, the lifetime is reduced if the low cycle fatigue leads to a degradation of the high cycle fatigue strength caused by crack initiation and crack growth. By analysing the fracture surface, the crack growth rate under combined cycle fatigue loading could be determined and it was significantly higher than under pure low cycle fatigue loading. The accelerated crack growth mainly causes the lifetime reduction.

Keywords: Low cycle fatigue; High cycle fatigue; Combined cycle fatigue; Fatigue crack growth; Damage development
* Dipl.-Ing. Domnin Gelmedin, Karlsruher Institut für Technologie (KIT), Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK), Campus Süd, Engelbert-Arnold-Straße 4, D-76131 Karlsruhe, Germany. Tel.: +49 721 608-46595, Fax: +49 721 608-48044, E-mail:

Dedicated to Prof. Dr.-Ing. Christina Berger on the occasion of her 65th birthday

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Received: 2011-9-8
Accepted: 2011-10-19
Published Online: 2013-06-11
Published in Print: 2012-01-01

© 2012, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110633
Keywords for this article
Low cycle fatigue; High cycle fatigue; Combined cycle fatigue; Fatigue crack growth; Damage development

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial January 2012
  5. Original Contributions
  6. High-strength aluminum-based light-weight materials for safety components – recent progress by microstructural refinement and particle reinforcement
  7. Microstructure – deformation relationships in fine grained high manganese TWIP steel – the role of local texture
  8. Microstructure of a eutectic NiAl—Mo alloy directionally solidified using an industrial scale and a laboratory scale Bridgman furnace
  9. Effect of Si addition on the oxidation resistance of Co–Re–Cr-alloys: Recent attainments in the development of novel alloys
  10. Corrosion behavior of silicon oxycarbide-based ceramic nanocomposites under hydrothermal conditions
  11. Thermal cycling damage evolution of a thermal barrier coating and the influence of substrate creep, interface roughness and pre-oxidation
  12. Influence of creep and cyclic oxidation in thermal barrier coatings
  13. Residual stress states as a result of bending and straightening processes of steels in different heat treatment conditions
  14. Residual stresses under quasi-static and cyclic loading in shot peened Inconel 718
  15. Investigation of the surface residual stresses in spray cooled induction hardened gearwheels
  16. Stress-gradient induced fatigue at ultra high frequencies in sub micron thin metal films
  17. Influence of graphite spherical size on fatigue behaviour and fracture toughness of ductile cast iron EN-GJS-400-18LT
  18. Failure behaviour of the superalloy MAR-M247 LC under LCF, HCF and combined LCF/HCF loading
  19. Measuring techniques for the very high cycle fatigue behaviour of high strength steel at ultrasonic frequencies
  20. Failure limits of continuous carbon fibre reinforced plastics loaded with fibre parallel compression
  21. Development of an integrative simulation method to predict the microstructural influence on the mechanical behaviour of semi-crystalline thermoplastic parts
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  23. DGM News
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