Highly cooled turbine blades undergo very high thermal gradients during rapid engine idle-max-idle cycling. Traditional isothermal fatigue data are often insufficient for predicting service lives. A complete set of high temperature tests, in the range of , was performed on single crystal alloy CMSX-4. The test program comprised tensile, creep, low cycle fatigue, and thermomechanical fatigue (TMF) tests. In particular the cycle time for TMF was 3 min, aiming to simulate the real high-power transient conditions in aircraft engines. Clockwise and counterclockwise diamond cycle types were applied on bare and coated specimens to investigate their influence on the fatigue limit. The comparison of the results obtained with the available ones from open literature is discussed.
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January 2010
Research Papers
Thermomechanical Fatigue Behavior of Bare and Coated CMSX-4
T. Coppola,
T. Coppola
Centro Sviluppo Materiali S.p.A.
, Via di Castel Romano 100, Roma 00128, Italy
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S. Riscifuli,
S. Riscifuli
Centro Sviluppo Materiali S.p.A.
, Via di Castel Romano 100, Roma 00128, Italy
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O. Tassa,
O. Tassa
Centro Sviluppo Materiali S.p.A.
, Via di Castel Romano 100, Roma 00128, Italy
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G. Pasquero
G. Pasquero
R&D,
Avio S.p.A.
, Via 1 Maggio 56, Rivalta di Torino 10040, Italy
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T. Coppola
Centro Sviluppo Materiali S.p.A.
, Via di Castel Romano 100, Roma 00128, Italy
S. Riscifuli
Centro Sviluppo Materiali S.p.A.
, Via di Castel Romano 100, Roma 00128, Italy
O. Tassa
Centro Sviluppo Materiali S.p.A.
, Via di Castel Romano 100, Roma 00128, Italy
G. Pasquero
R&D,
Avio S.p.A.
, Via 1 Maggio 56, Rivalta di Torino 10040, ItalyJ. Eng. Gas Turbines Power. Jan 2010, 132(1): 012101 (5 pages)
Published Online: September 29, 2009
Article history
Received:
April 1, 2008
Revised:
May 19, 2008
Published:
September 29, 2009
Citation
Coppola, T., Riscifuli, S., Tassa, O., and Pasquero, G. (September 29, 2009). "Thermomechanical Fatigue Behavior of Bare and Coated CMSX-4." ASME. J. Eng. Gas Turbines Power. January 2010; 132(1): 012101. https://doi.org/10.1115/1.3124666
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