Formation and mechanical properties of bulk Cu-Ti-Zr-Ni metallic glasses with high glass forming ability

被引：0

作者：

杨英俊 ^{[1
]}

康福伟 ^{[1
]}

邢大伟 ^{[1
]}

孙剑飞 ^{[1
]}

沈庆克 ^{[2
]}

沈军 ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Harbin Institute of Technology

[2] Department of Mechanical Engineering, Aviation University of Air Force

来源：

Transactions of Nonferrous Metals Society of China | 2007年 / 01期

关键词：

bulk metallic glass; glass forming ability; mechanical property; adiabatic heating;

D O I：

暂无

中图分类号：

TG139.8 [];

学科分类号：

080502 ;

摘要：

Bulk amorphous Cu52.5Ti30Zr11.5Ni6 and Cu53.1Ti31.4Zr9.5Ni6 alloys with a high glass forming ability can be quenched into single amorphous rods with a diameter of 5 mm, and exhibit a high fracture strength of 2 212 MPa and 2 184 MPa under compressive condition, respectively. The stress—strain curves show nearly 2% elastic strain limit, yet display no appreciable macroscopic plastic deformation prior to the catastrophic fracture due to highly localized shear bands. The present work shows clearly evidence of molten droplets besides well-developed vein patterns typical of bulk metallic glasses on the fracture surface, suggesting that localized melting induced by adiabatic heating may occur during the final failure event.

引用

页码：16 / 20

页数：5

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