MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Formation of High Strength In-situ Bulk Metallic Glass Composite with Enhanced Plasticity in Cu50Zr47.5Ti2.5 Alloy
Qingsheng ZhangHaifeng ZhangZhengwang ZhuZhuangqi Hu
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2005 Volume 46 Issue 3 Pages 730-733

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Abstract

New high strength in-situ bulk metallic glass (BMG) composite with enhanced plasticity was synthesized in Cu50Zr47.5Ti2.5 alloy. The enhanced phase is the primary crystalline precipitate, ZrCu phase. The in-situ bulk metallic glass composite with a diameter of 1.5 mm was successfully fabricated by copper mold casting Cu50Zr47.5Ti2.5 alloy. For the as-cast rod with a diameter of 1.5 mm, the compressive fracture strength and compressive fracture strain are 2.24 GPa and 10.5%, respectively. The precipitated ZrCu phase results in the formation of the large amount of shear bands in the whole specimen. This is the reason for the high plasticity of the in situ Cu50Zr47.5Ti2.5 BMG composite with the mixed structure of the ZrCu phase dispersing in the BMG matrix.

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© 2005 The Japan Institute of Metals and Materials
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