The hardness and wear resistance of Al-16% Si alloy FGM de crease gradually from inside to outside of the specimens, and change in gradient.

• 在外层一定厚度内，完全不含初晶硅；硬度分布为内层硬度较高，由内向外硬度逐渐减小，呈梯度分布；耐磨性由内向外呈梯度下降趋势。