Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 48: Issue 6
Modelling solute segregation to partial dislocations for DSC evaluations
Authors:
A. Varschavsky Facultad de Ciencias Fífsicas y Matemáticas, Instituto de Investigaciones y Ensayes de Materiales Universidad de Chile Casilla 1420 Santiago Chile

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E. Donoso Facultad de Ciencias Fífsicas y Matemáticas, Instituto de Investigaciones y Ensayes de Materiales Universidad de Chile Casilla 1420 Santiago Chile

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Pages:
1229–1248
Online Publication Date:
03 Aug 2005
Publication Date:
01 Jun 1997
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf01983434
Keywords:
α-Cu-Al alloys; dislocations; DSC; energetics; recrystallization; rolled; segregation; short-range-order
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A general model is discussed for assessing the energy release due to the pinning of solute atoms to partial dislocations. The present approach discloses the influence of dislocation character distributions on the magnitude of this energy. In order to test its validity in αCu-Al alloys, differential scanning calorimetry (DSC) evaluations associated with the different peaks involved during linear heating were performed employing both cold worked and quenched materials. Dislocation densities were calculated from recrystallization traces. On the basis of this model it was concluded that the observed energy difference between the deformed and the quenched materials during the exothermic peak designated as Stage 2 corresponds to the pinning process. It was also concluded that nearly equal number of edge and screw dislocations are present in the dislocation configuration of deformed alloys. Nevertheless, it is proposed that dislocation-induced order might also occur as a consequence of enhanced solute concentration around the partials.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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