Bulk metallic glasses: Smaller is softer

被引：207
作者：
Huang, Y. J. [1 ]
Shen, J. [1 ]
Sun, J. F. [1 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 08期
关键词：
D O I：
10.1063/1.2696502
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The authors report on the dramatic effect of sample size on the plastic deformation capability of a Ti-based bulk metallic glass. Compared with the larger one, the smaller size glassy alloy with the same chemical composition exhibits significantly enhanced plasticity, suggesting a "smaller is softer" trend of metallic glasses. The phenomenon is attributed to the fact that the smaller size alloy, which experienced a faster cooling rate during solidification, contains a larger amount of heats of relaxation and crystallization, favoring the preferential nucleation of shear bands and thus allowing enhanced plasticity upon compressive loading. (c) 2007 American Institute of Physics.
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