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- W2044257041 abstract "The influence of tin on the formation of the σ-phase, caused by an isothermal annealing at 700°C, in FeCr alloys with near equiatomic compositions was studied by means of 57Fe and 119Sn Mössbauer spectroscopy. It was shown that the addition of up to 5.5 at% Sn to the FeCr alloys retards the formation of the ø-phase significantly. The kinetics of the transformation follows the Johnson-Mehl equation. The evidence was found that tin precipitates on the grain boundaries if its nominal concentration exceeds ≈ 2 at%. For a given nominal concentration of added tin the size of grains was found to be the same in the α and σ-phases, but it was smaller for samples with higher Sn content. The composition of the σ-phase remains constant at a value of 46.7 at% Cr and 1.4 at% Sn, regardless of the nominal tin content. L'influence de l'étain dans la formation de la phase σ provoquée par un recuit isothermique à 700°C, a été étudiée pour les alliages FeCr avec des compositions presque equiatomiques par spectroscopie Mössbauer du 57Fe et du 119Sn. On a vérifé que l'addition d'étain jusqu'à 5,5 at% aux alliages FeCr retarde significativement la formation de la phase σ. La cinétique de la transformation suit l'equation de Johnson-Mehl. On a aussi observé que l'étain précipite sur les joins de grains quand sa composition nominale est supérieure à 2 at%. Pour chaque concentration nominale d'étain additional, les grains gardent la taille dans les deux phases: α et σ, cependant leur taille diminue quand la concentration d'étain augmente. On a aussi vérifié que la composition de la phase σ est toujours 46,7 at% Cr et 1,4 at% Sn, quel que soit la concentration nominale d'étain." @default.
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- W2044257041 date "1993-09-16" @default.
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- W2044257041 title "On the influence of tin on the formation of the σ-phase in the FeCr system" @default.
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- W2044257041 doi "https://doi.org/10.1002/pssa.2211390105" @default.
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