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High temperature fatigue behavior of tungsten copper compositesThe present study investigates the high-temperature fatigue behavior of a 9-v/o tungsten fiber-reinforced copper matrix composite. Load-controlled isothermal fatigue at 260 and 560 C and thermomechanical fatigue (TMF) experiments, both in-phase and out-of-phase between 260 and 560 C, were performed. The stress-strain response under all conditions displayed considerable inelasticity. Strain ratchetting was observed during all the fatigue experiments. For the isothermal fatigue and in-phase TMF tests, the ratchetting was always in a tensile direction, continuing until failure. The ratchetting during the out-of-phase TMF test shifted from a tensile to a compressive direction. For all cases, the fatigue lives were found to be controlled by the damage of the copper matrix. On a stress basis, TMF loading substantially reduced lives relative to isothermal cycling.
Document ID
19910071283
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Verrilli, M. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Kim, Y.-S.
(NASA Lewis Research Center Cleveland, OH, United States)
Gabb, T. P.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Composite Materials
Meeting Information
Meeting: TMS Fall Meeting
Location: Indianapolis, IN
Country: United States
Start Date: October 1, 1989
End Date: October 5, 1989
Sponsors: Minerals, Metals and Materials Society, ASM International
Accession Number
91A55906
Distribution Limits
Public
Copyright
Other

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