Chin. Phys. Lett.  2005, Vol. 22 Issue (9): 2338-2341    DOI:
Original Articles |
Reconsideration of Anelastic Relaxation Peaks in Pure Aluminium
SHANG Li-Yan;SHUI Jia-Peng;CAI Bin;CUI Ping
Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031
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SHANG Li-Yan, SHUI Jia-Peng, CAI Bin et al  2005 Chin. Phys. Lett. 22 2338-2341
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Abstract The temperature dependence of internal friction (T-tan ψ curves) in pure aluminium (Al) is measured at sixteen different frequencies. Based on T-tan ψ curves, the frequency dependence of internal friction (f-tan ψ curves) is also obtained by the interpolation method. An internal friction peak is observed in both the T-tan ψ curves and the f-tan ψ curves. The activation energy of the peak in the f-tan ψ curves is found to be 2.08 ± 0.02eV and compared to the value of 1.60 ± 0.04eV in the T-tan ψ curves. It is suggested that the change of relaxation strength with temperature should be considered when one calculates the activation energy of the peak in T-tan ψ curves.
Keywords: 62.40.+i      81.40.Jj      61.72.Mm     
Published: 01 September 2005
PACS:  62.40.+i (Anelasticity, internal friction, stress relaxation, and mechanical resonances)  
  81.40.Jj (Elasticity and anelasticity, stress-strain relations)  
  61.72.Mm (Grain and twin boundaries)  
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