Abstract
We consider the possibilities and basic methodical recommendations on the application of Fourier spectra for quantitative analysis of the evolution of structural states of metals by using an AMg6 aluminum alloy (tested under conditions of symmetric tension-compression at a frequency of 100 Hz at room temperature) as an example. It is shown that a parameter established from the diagrams of integral anisotropy can be used as an integral characteristic of the structure. For the analyzed structural states of the AMg6 alloy, this parameter varies from 0.11 for a residual durability of 90% to 0.31 for a residual durability of 10%, i.e., for the prefracture state. This means that, even within the period of relative stability of the process of integral accumulation of fatigue damage, the variation of the indicated structural parameter is as large as 182%.
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