HIGH STRAIN RATE SUPERPLASTICITY IN A SiC_w/2024Al COMPOSITE MADE BY SQUEEZE CASTING

Abstract

Abstract: In this paper,the superplastic characteristics of the beta-SiC whisker reinforced 2024aluminum composite, fabricated by squeeze casting and hot-rolling after extrusion were investigated. The compsite had a fine grain size of about 2μm, and exhibited a strain rate sensitivity of about 0.35 and a maximum elongation of 350% at an initial strain rate of 1.1×10-1s-1 at 803K. In addition, the superplastic deformation mechanisme of the composite were also examined.

Key words: high strain rate superplasticity, aluminum matrix composite, squeeze casting

X.J.Xu; D. Zhang; Z.L. Shi; C.Z.Zhao and R.J. Wu (State Key Laboratory of Metal Matrir Composites, Shanghai Jiaotong University, Shanghai 200030, China). HIGH STRAIN RATE SUPERPLASTICITY IN A SiC_w/2024Al COMPOSITE MADE BY SQUEEZE CASTING[J]. Acta Metallurgica Sinica (English Letters), 1998, 11(4): 275-280.

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HIGH STRAIN RATE SUPERPLASTICITY IN A SiC_w/2024Al COMPOSITE MADE BY SQUEEZE CASTING

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