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The Role of Be Addition on Glass Forming Ability and Plasticity of Zr-Cu-Al Ternary Amorphous Alloy System  

Shin, Sang-Soo (Division for Dongnam Area Technology Service, Korea Institute of Industrial Technology)
Lim, Kyoung-Mook (Division for Dongnam Area Technology Service, Korea Institute of Industrial Technology)
Kim, Eok-Soo (Division for Dongnam Area Technology Service, Korea Institute of Industrial Technology)
Publication Information
Journal of Korea Foundry Society / v.30, no.2, 2010 , pp. 83-88 More about this Journal
Abstract
Bulk amorphous alloys with reasonable glass forming ability and large plasticity were found in Zr-Cu-Al alloys. Further increase in the GFA and the ductility is expected by appropriately choosing a fourth element. In this study, we select Be as the fourth element and added to the Zr-Cu-Al system to synthesize $(Zr_{57.4}Cu_{38.1}Al_{4.5})_{100-x}Be_x$(x=0~16) alloys and the glass forming ability and the plasticity were measured. With Be addition, the supercooled liquid region (${\Delta}T_x$), the plasticity and GFA as high as $134^{\circ}C$, 20.5%, 7 mm, respectively, can be obtained. Herein, we present the effect of Be addition on the variations of various mechanical properties and thermal characteristics of the $(Zr_{57.4}Cu_{38.1}Al_{4.5})_{100-x}Be_x$ alloys.
Keywords
Bulk amorphous alloy; Glass forming ability; Plasticity; Supercooled liquid region; Atomic packing density;
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