Experimental determination of dynamic Young's modulus and mechanical damping, and theoretical prediction of dislocation density for depleted uranium-0.75 wt% titanium using the PUCOT
| Autor: | G. M. Ludtka, K. H. Keene, Alan Wolfenden |
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| Rok vydání: | 1988 |
| Předmět: |
Materials science
Mechanical Engineering Titanium alloy chemistry.chemical_element Modulus Mineralogy Young's modulus Atmospheric temperature range Microstructure Piezoelectricity symbols.namesake chemistry Mechanics of Materials symbols General Materials Science Dislocation Composite material Titanium |
| Zdroj: | Journal of Materials Science. 23:2871-2876 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/bf00547461 |
| Popis: | Dynamic Young's modulus (E) and mechanical damping (Q−1) measurements were made for three microstructures (γ, α + δ, and α′) of a depleted uranium-0.75 wt% titanium alloy. The temperature range covered was 298 to 1123 K. The apparatus was the piezoelectric ultrasonic composite oscillator technique (PUCOT) operated at 80 kHz. The ranges of values for E and Q−1 were 193 to 99 GPa and 3×10−3 to 8×10−2, respectively. Correlations for E of each heat treatment as functions of temperature are presented. In addition, the mechanical damping against strain amplitude plots generated from PUCOT data were analysed using the Granato-Luecke zero Kelvin and high-temperature theories of dislocation damping. Computed dislocation densities ranged up to 1016m−2. |
| Databáze: | OpenAIRE |
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