Microstructure Evolution in an UFG Al-7Mg Alloy Processed by ECAP during Subsequent Annealing

A binary Al-7Mg alloy has been processed by equal channel angular pressing (ECAP) via route Bc. After 5 passes ECAP, an ultrafine grained (UFG) material with an average grain size of ~0.2\956m and a Vickers hardness value of ~205 is obtained. In order to study the thermal stability of the UFG alloy,...

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Bibliographic Details
Published in:AIP conference proceedings 2012-03
Main Authors: Zha, Min, Li, Yanjun, Mathiesen, Ragnvald, Roven, Hans
Format: Article
Language:English
Subjects:
Aluminum base alloys
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Summary:A binary Al-7Mg alloy has been processed by equal channel angular pressing (ECAP) via route Bc. After 5 passes ECAP, an ultrafine grained (UFG) material with an average grain size of ~0.2\956m and a Vickers hardness value of ~205 is obtained. In order to study the thermal stability of the UFG alloy, a series of annealing treatments have been carried out. The microstructure evolution of the alloy during annealing has been characterized by transmission electron microscopy (TEM) and electron backscattered diffraction (EBSD). The recovery and recrystallization behavior of the alloy is discussed and also compared with the coarse grained Al-7Mg alloy processed by 3 passes ECAP.
ISSN:0094-243X