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- W2013875605 abstract "The kinetics of the α—σ isothermal transformation in Fe54Cr46 and Fe52Cr46Sn2 (at%) alloys was studied by magnetization (M) and electrical resistivity (ρ) measurements at constant temperature, T = 973 K. The variations of the resistivity with temperature during heating or cooling are interpreted in terms of the magnetic and structural evolutions of the alloys. The time dependence of the isothermal increase of ρ and of the decrease of M follows Johnson-Mehl-type equations with similar kinetic coefficients. Magnetization and resistivity studies, and also in-situ transmission electron microscopy investigations, confirm that the presence of Sn retards the α—σ transformation by preventing the σ phase nucleation at grain boundaries. Les cinétiques de la transformation isotherme de la phase α en phase σ ont été étudiées à T = 973 K pour deux alliages Fe54Cr46 et Fe52Cr46Sn2 (at%) en suivant l'évolution de l'aimantation et de la résistivité en fonction du temps de recuit. Les variations de la résistivité au chauffage et au refroidissement sont expliquées par les évolutions magnétiques et structurales des alliages. L' augmentation de résistivité isotherme et la diminuition de l'aimantation isotherme, ajustées à l'aide d'équations de Johnson-Mehl, conduisent à des valeurs cohérentes des paramètres cinétiques. Ces mesures et une étude in-situ de la transformation isotherme par microscopie électronique à transmission confirment que l'étain retarde la transformation α—σ en empéchant la germination de la phase σ aux joints de grains." @default.
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- W2013875605 date "1997-06-01" @default.
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- W2013875605 title "Magnetic and Transport Studies of the α—σ Transformation in Fe54Cr46 and Fe52Cr46Sn2 Alloys: Kinetics of σ Phase Formation" @default.
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- W2013875605 doi "https://doi.org/10.1002/1521-396x(199706)161:2<349::aid-pssa349>3.0.co;2-d" @default.
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