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  4. Fatigue and short crack propagation behaviour of cast nickel base alloys in 713 C and MAR-M-247 LC at high temperatures
 
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1992
Conference Paper
Title

Fatigue and short crack propagation behaviour of cast nickel base alloys in 713 C and MAR-M-247 LC at high temperatures

Other Title
Schwingfestigkeit und Fortschritt von kurzen Rissen in Nickelbasis-Gußlegierungen IN 713 C und MAR-M-247 LC unter hohen Temperaturen
Abstract
Cast nickel base alloys are used for integral turbine wheels of turbochargers and small gas turbine engines. Fatigue tests on unnotched specimens under constant strain amplitude loading were carried out in the temperature range of 400 degree C to 760 degree C without and with hold times in order to determine the monotonic and cyclic stress-strain and failure behaviour including crack initiation and propagation of short cracks starting from natural material defects. Additional CT- specimen tests showed that the crack propagation rate of short cracks is much higher than that of long cracks.
Author(s)
Bergmann, J.
Brandt, U.
Sonsino, C.M.
Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF  
Mainwork
Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials. Third International Conference  
Conference
International Conference on Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials 1992  
Language
English
Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF  
Keyword(s)
  • constant amplitude loading

  • crack propagation

  • Einstufenbeanspruchung

  • fatigue behaviour

  • fatigue strength

  • high temperature

  • hohe Temperatur

  • Kurzriß

  • Kurzzeitfestigkeit

  • low cycle fatigue strength

  • nickel alloy

  • Nickellegierung

  • Rißfortschritt

  • Schwingfestigkeit

  • Schwingfestigkeitsverhalten

  • short crack

  • ungekerbte Probe

  • unnotched specimen

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