Barely Significant

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For frequencies in the range from 0.1 kHz to 10 kHz, an increase in the plastic deformation degree was accompanied by a rise in the value of ωL/ωL 0 , while for the frequency of 100 kHz, ωL/ωL 0 first increased until the plastic deformation degree reached the level of about 15% to show a decreasing trend later on.
A significant variation of mechanical properties inherent in such steels, even for the initial state of the metal, was taken into account, so the operational change in certain properties could be stated only by identifying a clear trend.
Assessment of Operational Degradation of Pipeline Steels.
Materials (Basel) · 2021 · PMC8231119