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Static recrystallization and grain growth of accumulative roll bonded aluminum laminates

Published online by Cambridge University Press:  12 October 2017

Laura Lienshöft ,
Paul Chekhonin ,
Dana Zöllner ,
Juliane Scharnweber ,
Tom Marr ,
Tina Krauter ,
Heinz Werner Hoeppel  and
Werner Skrotzki
Laura Lienshöft
Affiliation:
Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
Paul Chekhonin
Affiliation:
Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
Dana Zöllner
Affiliation:
Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
Juliane Scharnweber
Affiliation:
Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
Tom Marr
Affiliation:
Leibniz-Institut für Festkörper- und Werkstoffforschung (IFW Dresden), Institut für Metallische Werkstoffe, D-01069 Dresden, Germany
Tina Krauter
Affiliation:
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Materials Science & Engineering, Institute I, Erlangen D-91058, Germany
Heinz Werner Hoeppel
Affiliation:
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Materials Science & Engineering, Institute I, Erlangen D-91058, Germany
Werner Skrotzki*
Affiliation:
Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
*
a)Address all correspondence to this author. e-mail: werner.skrotzki@tu-dresden.de
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Abstract

Aluminum laminates of high and technical purity layers were produced by accumulative roll bonding (ARB) at room temperature. To study the thermal stability, the laminates after 2 to 9 ARB cycles were annealed between 100 and 400 °C for one hour. Changes of the microstructure were analyzed by electron backscatter diffraction. For low ARB cycle numbers (4 or below) and 300 °C annealing temperature, the deformed technical pure layers start to recrystallize while the high-purity coarse recrystallized layers experience intralayer grain growth. For higher ARB cycle numbers (6 and 8) and an annealing temperature of 300 °C or above, the ultra-fine grained layers of technical purity are consumed by the layer overlapping growth of high-purity grains producing a banded grain structure. For 9 ARB cycles and at an annealing temperature of 400 °C, a globular grain structure develops with grain sizes larger than twice the layer thickness. The effect of impurities on recrystallization and grain growth of ARB laminates is discussed with regard to tailoring its microstructure by heat treatment. For further analyses, the results are compared with Potts model simulations finding a rather good qualitative agreement with the experimental data albeit some simplified model assumptions.

Keywords

cold workingannealingmicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 24: Focus Issue: Mechanical Properties and Microstructure of Advanced Metallic Alloys—in Honor of Prof. Haël Mughrabi PART B , 28 December 2017 , pp. 4503 - 4513
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Lei Lu

Dedicated to Prof. Dr. Hael Mughrabi on the occasion of his 80th birthday.

References

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