PROPERTIES AND MICROSTRUCTURE OF BRASS UNDER VARIABLE LOADING

S Mroziski, S Dymski
unpublished
In the paper there were presented changes of properties and microstructure in the specimens made of CuZn37 brass under fatigue test. During the analysis there were used parameters of hysteresis loop and microstructure changes for different levels of fatigue damage, that were registered during the tests. Basing on the analysis of three hysteresis loop parameters: stress amplitude σ a , plastic strain amplitude ε ap and plastic strain energy ΔW pl , it has been found that the smallest changes are
more » ... mallest changes are observed for the energy ΔW pl. Microstructure observations of brass specimens for various damage levels showed that fatigue damage cumulation is also visible in the grains of phase. Plastic strain of the brass was characterized by the presence of creep strands inside the grains.
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