摘要
研究了 6 0 6 1/ Al2 O3复合材料中球形 Al2 O3颗粒的强化作用。该强化颗粒的加入大大提高了材料在固溶处理后未时效状态的强度。对组织的观察和位错密度的测量表明 ,该强化作用与位错强化模型的计算结果一致。强化颗粒的加入还显著提高了材料在各种时效状态的加工硬化率。将 Ashby提出的含异质颗粒复合材料的几何必须位错模型与位错强化模型结合 。
The strengthening effect of Al 2O 3 microspheres was investigated in an Al 6061 based metal matrix composite. The strength of the material in the solid solution state was significantly increased by the addition of the reinforcement microspheres. This increase in strength corresponds well to the calculation of a dislocation strengthening model using dislocation densities measured from TEM observations. The strain hardening rate of the material in various aging states is also increased by this addition, which can be accounted for by the combination of the dislocation strengthening model and the model of geometrically necessary dislocations in plastically non homogeneous material proposed by Ashby.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2001年第3期52-55,共4页
Acta Materiae Compositae Sinica
