On the Strength of Silicon Carbide Particulate Reinforced Aluminium Alloy Matrix Composites

材料科学技术（英文）, 2004, 20(4): 451-453.

^1, , ^2, , ^3, , ^4,

1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

3.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

4.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

On the Strength of Silicon Carbide Particulate Reinforced Aluminium Alloy Matrix Composites

In the present study, the modified continuum model, quench strengthening and dislocation pile-up model was respectively used to estimate the yield strength of SiCp/Al composites. The experimental results showed that the modified shear lag model or quench strengthening model would underestimate the yield strength of SiCp/Al composites. However, the modified Hall-Petch correlation on the basis of the dislocation pile-up model, expressed as σcy = 244 + 371λ-1/2, fitted very well with the experimental data, which indicated that the strength increase of SiCp/Al composites might be due to the direct blocking of dislocation motion by the particulate-matrix interface.Namely, the dislocation pile-up is the most possible strengthening mechanism for SiCp/Al composites.

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On the Strength of Silicon Carbide Particulate Reinforced Aluminium Alloy Matrix Composites

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