EXPERIENCE WITH THERMOMECHANICAL FATIGUE UNDER SERVICE-TYPE LOADING

Abstract

Abstract: The thermomechanical fatigue behaviour of different high temperature alloys has been investigated and is under investigation respectively. The creep-fatigue behaviour of heat resistant steels was investigated by long-term service-type strain cycling tests simulating thermomechanical fatigue (TMF-) loading conditions at the heated surface of e.g. turbine rotors. Single-stage as well as three-stage cycles leads to similar results at the application of the damage accumulation rule. Life prediction which simulates typical combinations of cold starts, warm starts and hot starts has been established successfully for isothermal service-type loading and will be exceeded for thermomechanical loading. Long-term thermomechanical fatigue testing of Thermal Barrier Coating systems show typical delamination damage. An advanced TMF cruciform testing system enables complex multiaxial loading.

Key words: thermomechanical fatigue, multi-stage service-type loading, thermal barrier coating

A.Scholz, A.Schmidt, A.Samir, C.Berger. EXPERIENCE WITH THERMOMECHANICAL FATIGUE UNDER SERVICE-TYPE LOADING[J]. Acta Metallurgica Sinica (English Letters), 2004, 17(4): 407-413 .

References

1 G. Harkegard, High Temperature Structual Design, ESIS12, ed. L.H. Larsson (Mechanical Eng. Pub., London, 1992) p.21．
2 A. Scholz, J. Granacher and C. Berger, Proc. of the Fourth Int. Conf. on Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials, eds. K.T. Rie and P.D. Portella (Garmisch-Parten-Kirchen, 1998) p.741．
3 A. Scholz, H. Haase and C. Berger, Fatigue 2002, Proc. of the Eighth Int. Fatigue Congress, ed. A.F. Blom (Vol. 5/5, Stockholm, 2002) p.3133．
4 J. Granacher and A. Scholz, Proc. of the Third Int. Conf. "Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials" ed. K.T. Rie (Elsevier Appl. Sc., London, 1992) p.235．
5 M. Schwienheer, A. Scholz, H. Haase and C. Berger, Fifth Int. Conf. on Low Cycle Fatigue, LCF 5 (DVM, Berlin, 09-10 September, 2003) (to be published).
6 A. Scholz, H. Kirchner, P. Hortig, J. Granacher and C. Berger, Materials Week (Munchen) (2000) .
7 A. Scholz, B. Heinecke, A. Schmidt and C. Berger, Fifth Int. Conf. on Low Cycle Fatigue, LCF 5 (DVM, Berlin, 09-10, September 2003) (to be published).
8 C. Berger, B. Heinecke and A. Scholz, Proc. of Int. Turbomat Symp., Advanced Thermal Barrier Coating and Titanium Aluminides for Gas Turbines, ed. W.A. Kayser (DLR German Aero Space Center, Bonn, June 2002) p.72．
9 A. Scholz, A. Samir and C. Berger, Proc. of 7th Int. Conf. on Biaxial and Multiaxial Fatigue & Fracture eds. C.M. Sonsino, H. Zenner and P.D. Portella (Berlin, 2004) p.555．
10 C. Berger and A. Scholz, Untersuchung des Kriechermudungsverhaltens von Hochtemperaturwerkstof-fen unter anisothermer biaxialer Dehnwechelbeanspruchung, DFG-Project BE 1890, 16-1, IfW TU Darmstadt (2000-2003) .
11 M. Ohnami, M. Sakane, S. Mukai and T. Tsurui, Proc. of the Fourth Int. Conf. on Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials, eds. K.T. Rie and P.D. Portella (Garmisch-Partenkirchen, 1998) p.229．

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