Physical and Numerical Simulations of the Microstructure Evolution in AA6082 during Friction Stir Processing by Means of Hot Torsion and FEM

Friedrich Krumphals; Zeng Gao; Hassan Zamani; Stefan Mitsche; Norbert Enzinger; Christof Sommitsch

doi:10.4028/www.scientific.net/MSF.762.590

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Physical and Numerical Simulations of the Microstructure Evolution in AA6082 during Friction Stir Processing by Means of Hot Torsion and FEM
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HomeMaterials Science ForumMaterials Science Forum Vol. 762Physical and Numerical Simulations of the...

Physical and Numerical Simulations of the Microstructure Evolution in AA6082 during Friction Stir Processing by Means of Hot Torsion and FEM

Abstract:

A reproduction of the conditions occurring during friction stir processing, where a fine grained structure according to the process parameters rpm, transverse speed and pressure develops is the main focus in the present work. To physically simulate such a friction stir process, hot torsion tests at constant temperatures were carried out in a Gleeble ® 3800 machine at different strains and strain rates. The specimens were immediately water quenched after hot deformation to avoid any static recrystallization. The microstructure was investigated to characterize the grain size evolution and misorientation as a function of the local strain, strain rate and temperature. Dynamic recovery was observed followed by continuous dynamic recrystallization at large deformations. By means of DEFORM^TM3D the occurring strain, strain rate and temperature distributions, which are decisive for the observed microstructure evolution, were evaluated.

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Physical and Numerical Simulation of Materials Processing VII

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Periodical:

Materials Science Forum (Volume 762)

Pages:

590-595

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.762.590

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Online since:

July 2013

Authors:

Friedrich Krumphals, Zeng Gao, Hassan Zamani, Stefan Mitsche, Norbert Enzinger, Christof Sommitsch

Keywords:

AA6082, Finite Element Method (FEM), Friction Stir Spot Welding, Hot Torsion Tests

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