【摘要】 研究了二元Ａｌ－Ｓｉ合金的力学性能、氢含量和原子密度并分析了它们之间的关系，结果表明， Ａｌ－Ｓｉ合金的力学性能在共晶点附近达到最佳值，其溶氢能力随Ｓｉ含量的增加呈Ｖ形变化并在共晶点附 近达到最小值，而原子密度则呈倒Ｖ形变化． Ａｌ－Ｓｉ合金力学性能的变化是其液、固态微观结构演化综 合作用的结果．近共晶成分的Ａｌ－Ｓｉ合金有良好的综合性能．更多还原

【Abstract】 The mechanical properties, hydrogen contents and atomic densities of binary Al-Si alloys were measured and the relationships among them were analyzed systemically. The mechanical properties of Al-Si alloys reach optimal values near the eutectic point. With increase of content of Si, the variation curve of hydrogen contents is like a " V ") and the hydrogen content is minimum near the eutectic point while the curve of atomic densities is like an upended " V ". The change of mechanical properties of the alloys is the complex function of the microstructure evolution of the molten Al-Si alloys and solid structures. Therefore, Al-Si alloys near the eutectic point have outstandingly comprehensive properties.更多还原