Kinetics of the sigma-phase formation in an (Fe53.8Cr46.2)-0.1 at.% Ti alloy

Authors
Blachowski, A Cieslak, J Dubiel, SM
Citation
A. Blachowski et al., Kinetics of the sigma-phase formation in an (Fe53.8Cr46.2)-0.1 at.% Ti alloy, PHIL MAG L, 79(2), 1999, pp. 87-91
Citations number
6
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHILOSOPHICAL MAGAZINE LETTERS
ISSN journal
09500839 → ACNP
Volume
79
Issue
2
Year of publication
1999
Pages
87 - 91
Database
ISI
SICI code
0950-0839(199902)79:2<87:KOTSFI>2.0.ZU;2-Y
Abstract
The kinetics of the sigma-phase formation promoted by an isothermal anneal at T = 700 degrees C has been studied in a polycrystalline alloy of (Fe53.8 Cr46.2)-0.1 at % Ti using the Fe-57 Mossbauer effect. It was found that the addition of 0.1 at.% Ti to an Fe53.8Cr46.2 alloy drastically accelerates t he alpha-sigma transformation. The fraction of the sigma phase precipitated follows the Avrami-Johnson-Mehl equation. The best fits to the data yielde d the time constants, from which a Ti-induced decrease in the activation en ergy by about 14.0 kJ mol(-1) was estimated.