Within the scope of the transregional collaborative research centre TCRC73, the effects of an oscillation superimposed forming process for the production of a demonstrator component are investigated. Previous studies in this field were limited to a consideration of the process-related parameters such as the influence of the plastic work and the friction or the component-related parameters such as the influence of the surface quality and the mold filling. This research concentrates on the consideration of the mechanical vibration resistance of components that were manufactured superimposed oscillated. For this purpose, Wöhler tests are conducted in which the fatigue strength of superimposed oscillation pre-stretched test samples and oscillation-free pre-stretched test samples are investigated. First, Wöhler curves are generated in the tensile threshold range for tensile samples made out of the steels DC04 and DP600. Subsequently, tensile specimens are pre-stretched superimposed oscillated and oscillation-free. These specimens are subjected to a tensile threshold load until they break. The influence of the superimposed oscillation forming on the long-term fatigue of components is derived from the comparison of the bearable load cycles. Investigations of the microstructure of the specimens are conducted in order to draw conclusions about the influence on the long-term strength.

中文翻译：

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振动叠加对疲劳强度影响的研究

在跨区域合作研究中心TCRC73的范围内，研究了振动叠加成型工艺对生产演示器部件的影响。该领域以前的研究仅限于考虑与过程有关的参数，例如塑性加工和摩擦的影响，或者与组件有关的参数，例如表面质量和模具填充的影响。这项研究集中在考虑叠加振动制造的组件的抗机械振动性。为此，进行了Wöhler测试，其中研究了叠加的振动预拉伸试样和无振动预拉伸试样的疲劳强度。第一，对于由DC04和DP600钢制成的拉伸样品，在拉伸阈值范围内会生成Wöhler曲线。随后，将拉伸试样预叠加，使其振荡且无振荡。这些样品承受拉伸阈值载荷，直到断裂。叠加振动形成对部件长期疲劳的影响是通过可承受的载荷循环的比较得出的。为了得出关于对长期强度的影响的结论，进行了样品的微观结构的研究。叠加振动形成对部件长期疲劳的影响是通过可承受的载荷循环的比较得出的。为了得出关于对长期强度的影响的结论，进行了样品的微观结构的研究。叠加振动形成对部件长期疲劳的影响是通过可承受的载荷循环的比较得出的。为了得出关于对长期强度的影响的结论，进行了样品的微观结构的研究。