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Zener Relaxation Peak in an Fe-Cr-Al Alloy |
| ZHOU Zheng-Cun;CHENG He-Fa;GONG Chen-Li;WEI Jian-Ning;HAN Fu-Sheng |
| Laboratory of Internal Friction and Defects in Solids, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 |
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| Cite this article: |
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ZHOU Zheng-Cun, CHENG He-Fa, GONG Chen-Li et al 2002 Chin. Phys. Lett. 19 1660-1662 |
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Abstract We have studied the temperature spectra of internal friction and relative dynamic modulus of the Fe-(25 wt.%)Cr-(5 wt.%)Al alloy with different grain sizes. It is found that a peak appears in the internal friction-temperature plot at about 550 °C. The peak is of a stable relaxation and is reversible, which occurs not only during heating, but also during cooling. Its activation energy is 2.5 (± 0.15) eV in terms of Arrhenius relation. In addition, the peak is not obvious in the specimens with smaller grain size. It is suggested that the peak originates from Zener relaxation.
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| Keywords:
62.40.+i
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Published: 01 November 2002
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| PACS: |
62.40.+i
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(Anelasticity, internal friction, stress relaxation, and mechanical resonances)
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