The high cycle fatigue and fracture behavior of aluminum alloy 7055
- Univ. of Akron, OH (United States). Dept. of Mechanical Engineering
In this paper, the results of a recent study on the high-cycle fatigue and fracture behavior of aluminum alloy 7055 is presented and discussed. Specimens of the alloy, in the T7751 temper, were cyclically deformed over a range of stress amplitudes at both ambient and elevated temperatures. Increase in test temperature was found to have a detrimental influence on cyclic fatigue life of the specimens machined in the transverse orientation. Temperature was found to have little influence on fatigue life of the longitudinal specimens. No major change in macroscopic fracture mode was observed with direction of testing. Cyclic fracture, on a microscopic scale, revealed features reminiscent of both ductile and brittle mechanisms. The microscopic fracture behavior was a function of test temperature. The mechanisms governing cyclic fatigue response are discussed in light of the mutually interactive influences of microstructural effects, matrix deformation characteristics and test temperature.
- OSTI ID:
- 293097
- Report Number(s):
- CONF-970980--; ISBN 0-87339-382-1
- Country of Publication:
- United States
- Language:
- English
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