SUPERPLASTICITY OF A SiCw/2024 Al COMPOSITE MADE BY PRESSURE INFILTRATION
来源期刊：Acta Metallurgica Sinica2002年第5期
论文作者：L.Cai X.J.Xu W.Wang
Key words：superplasticity; aluminum matrix composites; pressure infiltration;
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.
L.Cai1，X.J.Xu1，W.Wang1
(1.JiangsuUniversity of Science and Technology, Zhenjiang 212013, China)
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;
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