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Low-Frequency Damping Behavior of Porous Magnesium

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Abstract:

The well-distributed porous magnesium was prepared through powder metallurgy route basing on space-holding method. The damping behavior of the porous magnesium was characterized by internal friction and measured by a multi-function internal friction apparatus. Experimental results revealed that the damping capacity of the porous magnesium was increased compared to that of the bulk magnesium, which can be understood by a dislocation damping mechanism associated with an inhomogeneous stress and strain distribution around the pores. In addition, an internal friction peak was observed in the spectra of internal friction against temperature. It was suggested that the dislocation sliding arising from a thermal activation process should be responsible for the peak appearance.

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Advanced Materials, ICAMMP 2011 View Preview

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Advanced Materials Research (Volumes 415-417)

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2002-2007

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https://doi.org/10.4028/www.scientific.net/AMR.415-417.2002

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Online since:

December 2011

Authors:

Gang Ling Hao, Qiao Ping Xu, Fu Sheng Han

Keywords:

Damping, Dislocation, Internal Friction, Porous Magnesium

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