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Homogeneous Flow of In Situ Bulk Metallic Glass Matrix Composite

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Abstract:

The compressive deformation behavior of as-cast Zr55.9Cu18.6Ta8Al7.5Ni10 Bulk Metallic Glass (BMG) composite with micro-scale particles of Ta-rich solid solution embedded in an amorphous matrix was investigated in the supercooled liquid region. It was found that the apparent viscosity of the BMG is dependent on temperature and strain rate. A deviation from a Newtonian behavior was observed at high strain rate and low temperature. The experimental results can be described by a master curve based on a stretched exponential function and the free volume theory. The structural state and the thermal ability of the BMG composite after deformation are also discussed in the paper.

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Periodical:

Materials Science Forum (Volumes 551-552)

Pages:

561-567

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.551-552.561

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Online since:

July 2007

Authors:

K.C. Chan, Q. Chen, L. Liu

Keywords:

Bulk Metallic Glass Composites, Plastic Deformation Mechanisms, Supercooled Liquid Region

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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