DAMPING AND ELASTIC PROPERTIES
AT LOW TEMPERATURES
Yu.A.Semerenko, V.А.Moskalenko, P.P.Pal-Val, А.R.Smirnov
B.Verkin Institute for Low Temperature Physics and Engineering,
In the temperature range 5¸325 K, the temperature dependences of decrement d, dynamic Young's modulus Е in a nanocryctalline Ti are investigated. Acoustic measurements were carried out by flexural vibration technique at frequencies 1.9¸3.2kHz. The grain size (30¸50 nm) was determined using electron microscopic technique. The effect of plastic deforming 120¸230% at 80K and 293K, annealing at 525¸940К on parameters of low-temperature internal friction and the related dynamic Young's modulus was studied. A similar acoustic properties of nanocrystalline Ti was observed also in .
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