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Dislocation Annihilation in L12 Alloys

Published online by Cambridge University Press:  22 February 2011

Xiaoli Shi ,
Georges Saada  and
Patrick VeyssiÈre Lem
Xiaoli Shi
Affiliation:
CNRS-ONERA, BP 72, 92322 Châtillon Cedex, France.
Georges Saada
Affiliation:
CNRS-ONERA, BP 72, 92322 Châtillon Cedex, France.
Patrick VeyssiÈre Lem
Affiliation:
Unité Mixte de Recherche : Centre National de la Recherche Scientifique (CNRS) - Office National d’Etude et de Recherche Aérospatiale (ONERA) UMR 104.
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Abstract

A transmission electron microscope (TEM) study of dislocation reactions that take place during the first few percents of permanent strain at room temperature is presented. The nature of the dipolar segments, a noticeable feature within the deformation microstructure, is elucidated. It is determined that antiphase boundary (APB) tube formation is unlikely to stem from the annihilation between a mobile superdislocation and an immobilized Kear-Wilsdorf (KW) configuration, at variance from what has been expected so far. A clear relationship between APB tubes and superlattice stacking fault (SSF) dipoles is pointed out.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 701
Copyright
Copyright © Materials Research Society 1995

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