Sample size effect and microcompression of Mg65Cu25Gd10 metallic glass

被引：160

作者：

Lee, C. J.

Huang, J. C. ^{[1
]}

Nieh, T. G.

机构：

[1] Natl Sun Yat Sen Univ, Inst Mat Sci & Engn, Ctr Nanosci & Nanotechnol, Kaohsiung 80424, Taiwan

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 16期

关键词：

D O I：

10.1063/1.2800313

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Micropillars with diameters of 1 and 3.8 mu m were fabricated from Mg-based metallic glasses using focus ion beam, and then tested in compression at strain rates ranging from 6x10(-5) to 6 x 10(-1) s(-1). The apparent yield strength of the micropillars is 1342-1580 MPa, or 60%-100% increment over the bulk specimens. This strength increase can be rationalized using the Weibull statistics for brittle materials, and the Weibull modulus of the Mg-based metallic glasses is estimated to be about 35. Preliminary results indicated that the number of shear bands increased with the sample size and strain rates. (C) 2007 American Institute of Physics.

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页数：3

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