A new Cu-Hf-Al ternary bulk metallic glass with high glass forming ability and ductility

被引：93
作者：
Jia, P
Guo, H
Li, Y
Xu, J
Ma, E
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[2] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117675, Singapore
[3] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA
来源：
SCRIPTA MATERIALIA | 2006年 / 54卷 / 12期
基金：
中国国家自然科学基金;
关键词：
metallic glasses; bulk amorphous alloys; glass-forming ability; copper; plasticity; ductility;
D O I：
10.1016/j.scriptamat.2006.02.042
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have discovered a new Cu-based bulk metallic glass (BMG). Although of a simple Cu49Hf42Al9 ternary composition, the as-cast alloy is a monolithic, uniform BMG with a critical diameter as large as 10 mm. The width of the supercooled liquid region AT, and the reduced glass transition temperature T-rg for this glass are 85 K and 0.62, respectively. In addition to its high glass-forming ability and high density of similar to 11 g/cc, this BMG exhibits high ductility with a compressive plastic strain of 11-13%, making it a good candidate for applications as well as for studies of deformation behavior of Cu-based BMGs. (c) 2006 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
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收藏
页码：2165 / 2168
页数：4
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