Microstructural Characterization of the Crystallization Sequence of a Severe Plastically Deformed Al-Ce-Ni-Co Amorphous Alloy
2006 ◽
Vol 519-521
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pp. 1329-1334
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Keyword(s):
Discs of Al85Ce8Ni5Co2 amorphous alloy were severely deformed by high pressure torsion. Severe plastic deformation exceeding equivalent strain of 8.2 induces the formation of nanocrystalline fcc-Al in a more stable residual amorphous matrix. Calorimetric and X-ray diffraction measurements revealed that the deformed outer part of the disc crystallizes into a mixture of equilibrium phases during the first thermal event. However, in the amorphous ribbon the same crystalline mixture develops only after the second stage.