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In Situ TEM Observations of Cross-Slip Mechanisms in NiAl with a Soft Orientation

Published online by Cambridge University Press:  15 February 2011

C. Vailhe ,
J. Douin  and
D. Caillard
C. Vailhe
Affiliation:
Virginia Tech., Dept of Materials Eng., Blacksburg, VA 24061, U.S.A.
J. Douin
Affiliation:
LEM - CNRS, ONERA, BP 72, 92322 Châtillon Cedex, France
D. Caillard
Affiliation:
CEMES - CNRS, 29 rue Jeanne Marvig,, BP 4347, 31055 Toulouse Cedex, France
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Abstract

In situ experiments have been conducted in NiAl single crystals in the soft orientation, at room temperature, in order to investigate the glide process of [100] dislocations. The results show that dislocations have a kinked shape in agreement with what is expected from anisotropie elasticity. Intensive cross-slip is observed, leading to slip in non-crystallographic planes and dipole formation. The ductility of the alloy is then discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 455
Copyright
Copyright © Materials Research Society 1997

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