| The wear mechanism of hypereutectic Al-Si alloys was almost independent of the initial shape and size of Si particles. However, the wear of this alloy depended on the hardness of counterbody and the sliding velocityIn experiments conducted on the counterbody having a hardness of 36HRC at sliding velocities from 0.074 to 0.277m/sec, a complex wear of the abrasive, the delamination and the adhesive wear took place. In case of the counterbody having a hardness of 51HRC at sliding velocities from 0.074 to 0.277m/sec, the wear resistance of T6 heat treated alloys increased with decreasing size and aspect ration of Si particles. The wear volume decreased with increasing counterbody hardness. The elasto-plastic finite element analyses have been made of the rotation of Si particles, the stress distribution in surface layer and the effects of morphology of Si particles on the stress distributions at the Si particle-Al matrix interface during slow sliding. |
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