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Investigation of Fretting Characteristics of Turbine Materials at Higher Temperatures
, Farris T, Okane M
Published in American Institute of Aeronautics and Astronautics
2002
Volume: 4
   
Pages: 2577 - 2585
Abstract
Two bodies are said to be in fretting contact when they are clamped together under the action of a normal force and see an oscillatory motion of small amplitudes at the contact interface due to the effect of shear force and bulk stress. The contact stresses that drive crack nucleation are very sensitive to the shape of the contacting surfaces and the coefficient of friction. To have an understanding of fretting at the contacts in engine components, it is important to simulate similar temperature, load and contact conditions in the laboratory and develop tools to analyze the contact conditions. The efforts made at simulating the temperature and load conditions typical to the engine hardware and the development of a robust mechanics based tool for life prediction are presented. The features of the rig include a combination of an efficent cooling mechanism using water and an insulation mechanism using ceramic blocks and sheets. The rig has been used to conduct an initial set of experiments using Single Crystal Nickel (SCN) specimens and IN100 pads, and was found to function well under the operating temperature and load conditions. The effect of loads on fretting fatigue suitable for model development is described.
About the journal
JournalData powered by TypesetCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
PublisherData powered by TypesetAmerican Institute of Aeronautics and Astronautics
ISSN02734508
Impact Factor1.868
Open AccessNo
Citation Styleunsrt
Sherpa RoMEO Archiving PolicyGreen