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- W2076068371 abstract "Abstract We have used the piezoelectric ultrasonic composite oscillator technique to measure continously the mechanical damping (Q −1 (s)) in polycrystalline 72.22 a/o AuAg over the temperature range 300 – 930 K. A damping peak was observed at 390 – 515 K and a steep rise in Q −1 (s) above 667 K. The break away strain amplitude e 11 (b) was found to be temperature dependent and values of Q −1 (s) and e 11 (b) had an inverse relation such that Q −1 (s) · e 11 (b) was approximately constant. An analysis of the results in terms of the Granato-Lucke theory leads us to suggest that dislocation damping is a probable damping mechanism for all the temperatures that we investigated. For temperatures below about 670 K L c decreases with increasing temperature while above this temperature L c increases as the temperature is raised. That 670 K is the temperature dividing two regions is also supported by the amplitude independent damping which is a minimum at 670 K and the break away strain amplitude which is a maximum at this temperature. Possibly above 670 K the AuAg alloy becomes short range disordered." @default.
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- W2076068371 date "1977-11-01" @default.
- W2076068371 modified "2023-10-18" @default.
- W2076068371 title "Mechanical damping in a polycrystalline gold-silver alloy" @default.
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- W2076068371 doi "https://doi.org/10.1016/0036-9748(77)90253-8" @default.
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