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Fabrication and Mechanical Properties of Ni-based Amorphous Bulk Alloys  

Kim, Sung-Gyoo (Department of Production & Joining Engineering, Pukyung National University)
Publication Information
Journal of Korea Foundry Society / v.22, no.6, 2002 , pp. 288-292 More about this Journal
Abstract
Ni-base amorphous alloys were manufactured using melt-spinning and Cu-mold die casting methods. Amorphous formability, the supercooled liquid region before crystallization and mechanical properties were examined. The reduced glass transition temperature and the supercooled liquid region of $Ni_{51} Nb_{20} Zr_9 Ti_9 Co_8 Cu_3$alloy were 0.621 and 46 K respectively. $Ni_{51} Nb_{20} Zr_9 Ti_9 Co_8 Cu_3$ alloy was produced in the rod shape 3mm diameter using the Cu-mold die casting. Hardness, compression strength, elongation and elastic modulus of the alloy were 850 DPN, 2.75 GPa, 1.8% and 150 GPa respectively. Moreover, compression strength of 2.75 GPa was the highest value in the amorphous bulk alloy produced up to now.
Keywords
Ni-based Amorphous alloy; Rapid Solidification; Glass Transition; Wide Supercooled Liquid Region; Amorphous Bulk Alloy;
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