NANOCRYSTALLINE Ti:

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,

National Academy of Sciences of Ukraine, Kharkov, Ukraine

e-mail: semerenko@ilt.kharkov.ua

 

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 [1].

 

1.  I.S.Golovin, T.S.Pavlova, S.B.Golovina, H.-R.Sinning, S.A.Golovin. Mater.Sci.&Eng. A 442, 165 (2006).