Abstract
6082 Al alloy was investigated in its initial state (IS) and in its multiple forged (MF) state. The MF specimens were obtained using multi-step closed die forging. A cold compression test at room temperature was accomplished in order to measure the deformation anisotropy of MF specimens; it was also used to obtain the standard stress-strain curve. The homogeneity and structure were both evaluated by Vickers hardness measurements. While image analysis was based on optical microscopy investigations. Moreover, the open and closed die forging were simulated using Simufact software. The results showed the effects of the multiple forging process on the material. The outcome of the hardness measurement demonstrated the homogeneity of the structure. Whereas the micrographs described the microstructure development (during the multiple forging process) and the change of the grains shape over the cross section of the MF specimen.
Kurzfassung
Für den vorliegenden Beitrag wurde eine Aluminiumlegierung 6082 im ursprünglichen (Initial State (IS)) und im mehrfach geschmiedeten Zustand (Multiple Forged (MF)) untersucht. Die MF-Proben wurden mittels eines mehrstufigen Gesenkschmiedeprozesses hergestellt. Es wurde ein Kaltstauchversuch bei Raumtemperatur durchgeführt, um die Deformationsanisotropie der MF-Proben zu ermitteln, und um die Standard-Spannungs-Dehnungs-Kurven zu bestimmen. Außerdem wurden Härtemessungen durchgeführt. Die Homogenität und die Struktur des Werkstoffes wurden unter Vergleich der Vickershärte und der Bildanalyse basierend auf lichtmikroskopischen Untersuchungen ermittelt. Darüber hinaus wurde das Freiformschmieden und das Gesenkschmieden mittels der Software Simufact simuliert. Die Ergebnisse zeigten die Einflüsse des Mehrfachschmiede-Prozesses auf den Werkstoff. Die Härtemessungen wiesen auf die Strukturhomogenität hin und die Gefügeaufnahmen zeigten die Mikrostrukturentwicklung während des Mehrfachschmiedeprozesses sowie die Veränderungen der Kornform innerhalb des Querschnitts der MF-Proben.
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