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Precipitation-Induced Nano-Twinning

Published online by Cambridge University Press:  26 February 2011

Franz Dieter Fischer ,
Fritz Appel  and
Helmut Clemens
Franz Dieter Fischer
Affiliation:
[email protected], Montanuniversität Leoben, Institute of Mechanics, Franz-Josef-Strasse 18, Leoben, A-8700, Austria, ++43 3842 402 4000, ++43 3842 46048
Fritz Appel
Affiliation:
[email protected], GKSS Research Centre, Institute for Materials Research, Max-Planck-Strasse, Geesthacht, D-21502, Germany
Helmut Clemens
Affiliation:
[email protected], 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.

Keywords

alloynanostructuresimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 980: Symposium II – Advanced Intermetallic-Based Alloys , 2006 , 0980-II02-06
Copyright
Copyright © Materials Research Society 2007

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