Consolidation of Amorphous Al86Ni6Co2Gd6 Melt-Spun Ribbons by Twist Extrusion

Viktor Varyukhin; V.I. Tkatch; V.V. Maslov; Yan Beygelzimer; Sergey Synkov; V.K. Nosenko; S.G. Rassolov; Alexandr Synkov; V.I. Krysov; V.A. Mashira

doi:10.4028/www.scientific.net/MSF.503-504.699

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HomeMaterials Science ForumMaterials Science Forum Vols. 503-504Consolidation of Amorphous Al86Ni6Co2Gd6 Melt-Spun...

Consolidation of Amorphous Al₈₆Ni₆Co₂Gd₆ Melt-Spun Ribbons by Twist Extrusion

Abstract:

Amorphous Al86Ni6Co2Gd6 ribbons produced by melt-spinning processing were consolidated using twist extrusion (TE). Electrical resistance measurements showed that under continuous heating at 5 K/min crystallization begins at 473 K by formation of Al-nanocrystals and ends at 673 K by formation of equilibrium intermetallics. From one to five TE extrusion passes were conducted in several experiments at temperatures 458-573 K and applied pressures ranged between 1150-1700 MPa. The fully dense billets with dimensions 14×23×40 mm3 were produced at extrusion temperatures ≥ 523 K. The maximum microhardness (550 kgf/mm2) was reached for the bulk materials consolidated at 523 K with a nanocomposite structure consisted of Al-nanocrystals with size about 13 nm embedded in amorphous matrix. The billet compacted at 573 K has a fully crystallized structure and lower microhardness (380 kgf/mm2).

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Materials Science Forum (Volumes 503-504)

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699-704

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.503-504.699

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Online since:

January 2006

Authors:

Viktor Varyukhin, V.I. Tkatch, V.V. Maslov, Yan Beygelzimer, Sergey Synkov, V.K. Nosenko, S.G. Rassolov, Alexandr Synkov, V.I. Krysov, V.A. Mashira

Keywords:

Amorphous Melt-Spun Ribbons, Consolidation, Microhardness, Nanostructured Materials, Twist Extrusion

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