Unusual room-temperature compressive plasticity in nanocrystal-toughened bulk copper-zirconium glass

被引:276
作者
Inoue, A
Zhang, W
Tsurui, T
Yavari, AR
Greer, AL
机构
[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
[2] Japan Sci & Technol Agcy, Aoba Ku, Sendai, Miyagi 9808577, Japan
[3] CNRS, Inst Natl Polytech Grenoble, LTPCM, F-38402 St Martin Dheres, France
[4] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England
基金
日本学术振兴会;
关键词
D O I
10.1080/09500830500197724
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Cast Cu50Zr50 alloy rods with a diameter of 1 mm have been found to consist of a glassy phase containing. ne crystalline particles with a size of about 5 nm. They have a glass transition temperature T-g of 675 K, and a large supercooled-liquid region extending 57 K above T-g. The rods exhibit a high yield strength of 1860 MPa and a Young's modulus of 104 GPa. Because they contain a dispersion of embedded nanocrystals, the as-cast bulk metallic glass rods can sustain a compressive plastic strain at room temperature of more than 50%, an exceptional value which is explicable by compensation of any shear softening by nanocrystal coalescence and pinning of shear bands.
引用
收藏
页码:221 / 229
页数:9
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