Title of article :
Anelasticity of polycrystalline indium
Author/Authors :
Sapozhnikov، نويسنده , , K. and Golyandin، نويسنده , , S. L. Kustov and E. G. Sverdlova، نويسنده , , S.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Abstract :
Mechanisms of anelasticity of polycrystalline indium have been studied over wide ranges of temperature (7–320 K) and strain amplitude (2 × 10−7–3.5 × 10−4). Measurements of the internal friction and Youngʹs modulus have been performed by means of the piezoelectric resonant composite oscillator technique using longitudinal oscillations at frequencies of about 100 kHz. The stages of the strain amplitude dependence of the internal friction and Youngʹs modulus defect, which can be attributed to dislocation – point defect and dislocation – dislocation interactions, have been revealed. It has been shown that thermal cycling gives rise to microplastic straining of polycrystalline indium due to the anisotropy of thermal expansion and to appearance of a “recrystallization” internal friction maximum in the temperature spectra of amplitude-dependent anelasticity. The temperature range characterized by formation of Cottrellʹs atmospheres of point defects around dislocations has been determined from the acoustic data.
Keywords :
anelasticity , Indium , Internal friction , Lattice defects
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Journal title :
MATERIALS SCIENCE & ENGINEERING: A