Development of a Phenomenological Method for Description of Crack Initiation Behavior under Thermo-Mechanical Fatigue Loading

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Abstract:

Description of crack initiation behavior under thermo-mechanical fatigue (TMF) of modern high chromium steel is prerequisite for design optimization of steam turbine components. In this paper a phenomenological method which envelopes the synthesis of stress-strain hysteresis loops according to cycle counting methods and the individual assessment of creep fatigue damage is extended to TMF with superimposed creep. Recalculation of such service-type experiments on specimen of rotor steel 10CrMoWVNbN shows acceptable results for deformation description and lifetime estimation.

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Advanced Materials Research (Volumes 415-417)

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986-989

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December 2011

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[1] A. Scholz and C. Berger: Deformation and life assessment of high temperature materials under creep fatigue loading, Mat. -wiss. u. Werkstofftechn. 36, No. 11, pp.722-730 (2005).

DOI: 10.1002/mawe.200500941

Google Scholar

[2] W. Ramberg and W.R. Osgood: Technical Report No. 902, NACA (1943).

Google Scholar

[3] F.H. Norton: The creep of steel at high temperature, McGraw Hill, (1929)

Google Scholar

[4] S. Taira: In: Structures, pp.96-119, N.J. Hoff (Ed.), Academic Press, (1962).

Google Scholar

[5] L. Cui: Zum Einfluss der komplexen Kriechermüdungsbeanspruchung auf die Lebensdauer am Beispiel des Turbinenwerkstoffes X12CrMoWVNbN10-1-1, Dr.-Ing. Diss., TU-Darmstadt, D17 (2011).

Google Scholar

[6] H. Haase: Betriebsähnliches Langzeitdehnwechselverhalten moderner martensitischer 9 bis 10%Cr-Stähle, Dr.-Ing. Diss., TU-Darmstadt, D17 (2004).

Google Scholar

[7] Draft International Standard ISO/DIS 12111, ISO/TC 14/SC 5, 2009, Metallic materials – Fatigue testing – Strain-controlled thermomechanical fa-tigue testing method

DOI: 10.3403/30096503

Google Scholar