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Licensed Unlicensed Requires Authentication Published by De Gruyter May 23, 2016

Mechanical behavior of a multiple forged 6082 Al alloy

Mechanisches Verhalten einer mehrfach geschmiedeten 6082-Aluminiumlegierung
Tareg S. Ben Naser and György Krallics
From the journal Materials Testing

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.


*Correspondence Address, Tareg S. Ben Naser, Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rakpart 3, 1111 Budapest, Hungary. E-mail:

Ben Naser, born in 1972, is a PhD student in the Department of Materials Science and Engineering at the Budapest University of Technology and Economics, Hungary. His research interests lie in ultrafine grain bulk materials and materials testing.

Associate Prof. Dr. György Krallics, born in 1951, has research interests in plastic deformation of metals, modeling of metal forming processes, bulk nanostructured metals as well as fracture and fatigue. Since 1993, he has been Associate Professor in the Department of Materials Science and Engineering at the Budapest University of Technology and Economics, Hungary.


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Published Online: 2016-05-23
Published in Print: 2016-06-01

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