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Study of alpha-sigma phase transformation in mechanically alloyed Fe-Cr-Sn alloys

Authors: B.F.O. Costa, G. Le Caër and N. Ayres de Campos

Ref.: Phys. Stat. Solidi (a) 183, 235-250 (2001)

Abstract: The solubility of tin is significantly extended by mechanical alloying in near equiatomic Fe-Cr alloys. The influences of Sn concentration and of grain size on the kinetics of formation of the a-phase have been studied using different techniques. The sigma -phase formation is much faster for as-milled alloys than it is for conventional alloys. The sigma -phase formation rate decreases with the increase of Sn concentration in alloys with nanometer-sized grains as it does in coarse-grained alloys. The mechanisms which are responsible for the slowing-down of the alpha-sigma transformation are different in both kinds of alloys.

DOI: 10.1002/1521-396X(200102)183:2<235::AID-PSSA235>3.0.CO;2-Z