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On Thermomechanical Processing of High Ductility SiCp/Zn 22wt.%Al Metal Matrix Composites

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Abstract:

SiCp/Zn-22 wt% Al metal matrix composites of different particulate sizes have been prepared and tensile tested at 250°C at various strain rates. Scheduled thermomechanical treatment of structural refinement was employed to enhance the ductility of the composites. Substantial ductility of over 500% elongation bas been achieved within the strain rates investigated. The highest elongations are generally obtained by the samples reinforced with large particulates. Microstructural examination of the tested samples shows significant material cavitation and particulate separation in the material after tensile deformation. It was found that the particles had a de-strengthening effect.

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Periodical:

Materials Science Forum (Volumes 475-479)

Pages:

979-984

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.979

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Cite this paper

Online since:

January 2005

Authors:

P. Zhu, Wing Yiu Yeung, Greg Heness, B.J. Duggan

Keywords:

Metal Matrix Composite (MMC), Superplasticity, Thermomechanical Process

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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