Influence of Modification with CuP Master Alloy and Rapid Crystallization on the Tribological Properties of AlSi17Cu5Mg Alloy

The paper presents tests determining the influence of modification with phosphorus and fast cooling on the microstructure and friction coefficient of AlSi17Cu5Mg alloy. Changes mainly concern the size of primary silicon crystals and stereological parameters in reference to initial material. Modification with fast cooling was aimed at achievement of fine-crystalline structure with shapes of silicon crystals close to the spherical shape. The consequences of such activities are visible, significant changes in the tribological properties of tested alloy. Friction coefficient μ for material subject to fast cooling was on the level of 0.26 and for initial material it equalled 0.29.