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- W4382046197 abstract "During cold forming processes of metals, such as forward extrusion, ductile pre-damage occurs in the microstructure which can strongly influence the mechanical properties of components, especially under operating conditions. The influence of typical forming process parameters on the bending fatigue behavior and the damage evolution is unknown so far. With the knowledge of forming-induced pre-damage influence on the fatigue performance, the design of components can be optimized in terms of higher safety and reliability, as well as lightweight construction. In this study, the influence of the deformation degree due to forming processes on the microstructure and the associated bending fatigue behavior of 16MnCrS5 steel is investigated. The aim is the development of a method for a sensitive and accurate non-destructive damage characterization. Therefore, direct current potential drop (DCPD) measurements are applied to determine damage state and evolution and to evaluate the interaction and separation of ductile pre-damage and fatigue damage mechanisms. The flat specimens of 16MnCrS5 steel in two deformation degrees are characterized by comparable microstructure and hardness, while pore size and number due to forming-induced pre-damage differ. Within electrical resistance measurements, the so-called delta mode is used to eliminate thermal effects. Consequently, increasing damage degree leads to increasing resistance. Furthermore, it is shown that the forming-induced pre-damage has no significant influence on the bending fatigue behavior in the high cycle fatigue (HCF) regime." @default.
- W4382046197 created "2023-06-27" @default.
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- W4382046197 date "2023-01-01" @default.
- W4382046197 modified "2023-10-01" @default.
- W4382046197 title "Direct current potential drop characterization of forming-induced pre-damage influence on bending fatigue behavior of 16MnCrS5" @default.
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- W4382046197 doi "https://doi.org/10.1016/j.prostr.2023.06.016" @default.
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