Grain Boundary Relaxation in a Fe-Cr-Al Alloy

Zheng Cun Zhou; Qing Zhou Wang; Jie Du; H. Yang; Y.J. Yan

doi:10.4028/www.scientific.net/AMR.415-417.2134

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 415-417Grain Boundary Relaxation in a Fe-Cr-Al Alloy

Grain Boundary Relaxation in a Fe-Cr-Al Alloy

Abstract:

The features of grain boundary relaxation of a (wt.%)Fe-25Cr-5Al alloy have been investigated using a multifunction internal friction apparatus. The grain boundary relaxation peak appears at about 630oC on the internal friction-temperature curves for the alloy. The peak temperature shifts toward high temperature with increasing frequency. In terms of Arrihenius relation, the activation energy is calculated to be 4.07(±0.15)eV and the pre-exponential factor is 6.2×10^-24±1s. Grain boundary relaxation strength remarkably decreases with increasing grain size. When grain size reaches 520μm, the grain boundary relaxation peak almost disappears.

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Periodical:

Advanced Materials Research (Volumes 415-417)

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2134-2137

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https://doi.org/10.4028/www.scientific.net/AMR.415-417.2134

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December 2011

Authors:

Zheng Cun Zhou, Qing Zhou Wang, Jie Du, H. Yang, Y.J. Yan

Keywords:

Fe-25Cr-5Al Alloy, Grain Boundary Relaxation

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