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Ball milling in vacuum of alpha and sigma phases of near-equiatomic FeCr alloys

Authors: B.F.O. Costa, G. Le Caƫr and J.M. Loureiro

Ref.: Journal of Alloys and Compds 483, 70-73 (2009)

Abstract: The structural changes induced by ball-milling of near-equiatomic sigma-FeCr and alpha-FeCr in vacuum were followed. Besides the a-phase, an amorphous phase appears when milling the sigma-phase for times longer than 20 h. An amorphous phase forms too, but at a slower rate than the latter, when milling the alpha-phase. The partial amorphisation of sigma-FeCr and alpha-FeCr ball-milled in vacuum is concluded to be a phenomenon of intrinsic origin. The amorphous phase crystallizes into a bcc Cr-rich phase and a bcc Fe-rich phase during short annealing steps. (C) 2008 Elsevier B.V. All rights reserved.

DOI: 10.1016/j.jallcom.2008.07.179