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INFLUENCE OF HEAT TREATMENT ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ALUMINIUM

The paper deals with the influence of heat treatment (annealing, quenching and aging) on the microstructure and mechanical properties of pressed bars made from the CuAl10Ni5Fe4 alloy. The microstructures were observed in light and scanning electron microscopes. The appearance and area fractions of the and phases and their influence on the mechanical properties were examined. Using DSC and EBSD methods, the presence of the 2 phase was monitored, as it is a very hard and brittle phase that impairs the material’s corrosion resistance. The results were compared with data for the high-alloyed CuAl14Fe5 aluminium bronze, in which high hardness and wear resistance are imparted by the + 2 phases.