Phase transitions in shock-loaded titanium at pressures up to 150 GPa
| Autor: | M. I. Tkachenko, V. A. Borisenok, A. M. Podurets, V. G. Simakov, A. E. Kovalev, M. V. Zhernokletov |
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| Rok vydání: | 2014 |
| Předmět: |
Phase transition
Yield (engineering) Materials science Shock (fluid dynamics) General Chemical Engineering Analytical chemistry General Physics and Astronomy Energy Engineering and Power Technology chemistry.chemical_element Mineralogy General Chemistry Polyvinylidene fluoride chemistry.chemical_compound Fuel Technology chemistry Phase (matter) Speed of sound Manganin Titanium |
| Zdroj: | Combustion, Explosion, and Shock Waves. 50:346-353 |
| ISSN: | 1573-8345 0010-5082 |
| Popis: | Phase transformations in VT1-0 titanium were studied. Shock profiles in the pressure range of 10–26 GPa were recorded by polyvinylidene fluoride sensors. Sound velocities in shock-compressed titanium samples were measured by two methods. At a pressure less than 30 GPa, the speed of sound in titanium was determined by the counter unloading method using Manganin gauges, and at a pressure of 30–150 GPa, it was determined by the overtaking unloading method using indicator liquids. At a pressure of 20–40 and 60–90 GPa, the pressure dependences of the speed of sound have breaks, the first of which is apparently associated with the α → ω conversion, and the second with melting. X-ray analysis revealed the presence of the ω phase in the samples in steel capsules recovered after loading at a pressure of 9–23 GPa. The dependence of the yield of the ω phase on the loading pressure has the form of a curve with a maximum at p ≈ 15 GPa. |
| Databáze: | OpenAIRE |
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