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Precipitation-Induced Nano-Twinning

Published online by Cambridge University Press:  26 February 2011

Franz Dieter Fischer
Affiliation:
mechanik@unileoben.ac.at, Montanuniversität Leoben, Institute of Mechanics, Franz-Josef-Strasse 18, Leoben, A-8700, Austria, ++43 3842 402 4000, ++43 3842 46048
Fritz Appel
Affiliation:
appel@gkss.de, GKSS Research Centre, Institute for Materials Research, Max-Planck-Strasse, Geesthacht, D-21502, Germany
Helmut Clemens
Affiliation:
helmut.clemens@unileoben.ac.at, Montanuniversität Leoben, Department of Physical Metallurgy and Materials Testing, Franz-Josef-Strasse 18, Leoben, A-8700, Austria
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Abstract

γ(TiAl) alloys containing Ti3AlC perovskite precipitates show overlapping planar faults, which can apparently rearrange into embryonic twins and subsequently grow into large twins. An electron-microscopical study is introduced and followed by a micromechanical modelling of the fault and twin development process. The thickness and length of the embryonic twins can be predicted with the developed model.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

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References

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