SUPERPLASTICITY OF A SiCw/2024 Al COMPOSITE MADE BY PRESSURE INFILTRATION

Abstract

Abstract: The superplastic characteristics of the β-SiC whisker reinforced 2024 aluminum com-posite, fabricated by pressure infiltration and hot-rolling after extrusion, were inves-tigated. The composite has a fine grain size of about 1μm, and exhibits a maximumtensile elongation of 370% in the initial strain rate of 3.3× 10-3 s-1 at 788K. The su-perplastic deformation mechanism of the composite is thought to be grain boundary(interface) sliding accommodated by grain boundary diffusion of aluminum atom andan appropriate amount of liquid phase.

Key words: superplasticity, aluminum matrix composites, pressure infiltration

X.J. Xu, W. Wang, L. Cai. SUPERPLASTICITY OF A SiCw/2024 Al COMPOSITE MADE BY PRESSURE INFILTRATION[J]. Acta Metallurgica Sinica (English Letters), 2002, 15(5): 425-430 .

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SUPERPLASTICITY OF A SiCw/2024 Al COMPOSITE MADE BY PRESSURE INFILTRATION

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