Correlation between heat- and deformation-induced crystallization of amorphous Al alloys

Deformation-induced crystallization is correlated with thermal-induced crystallization in alloys with different compositions in a single amorphous alloy system. In Al 87 Y 6 Ni 5 Co 2 and Al 85 Y 8 Ni 5 Co 2 alloys, which undergo primary crystallization during heating, deformation-induced crystalliz...

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Bibliographic Details
Published in:Philosophical magazine letters 2008-12, Vol.88 (12), p.863-870
Main Authors: Fogagnolo, J.B., Sá Lisboa, R.D., Bolfarini, C., Kiminami, C.S., Botta, W.J.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
differential scanning calorimetry
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
high-pressure torsion
melt-spinning
Physics
Solid-solid transitions
Specific phase transitions
transmission electron microscopy
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Summary:Deformation-induced crystallization is correlated with thermal-induced crystallization in alloys with different compositions in a single amorphous alloy system. In Al 87 Y 6 Ni 5 Co 2 and Al 85 Y 8 Ni 5 Co 2 alloys, which undergo primary crystallization during heating, deformation-induced crystallization of fcc-Al has been observed. In Al 83 Y 10 Ni 5 Co 2 alloy, which undergoes eutectic-like crystallization, no deformation-induced crystallization was observed. These observations can be explained by the presence or absence of quenched-in nuclei and the work required for the creation of an amorphous/crystalline interface under compressive stress.
ISSN:0950-0839
1362-3036
DOI:10.1080/09500830802464210