Tensile Elastic Behavior of a Zr-Cu-Ag-Al Bulk Metallic Glass

被引：8

作者：

Cao, Q. P. ^{[1
]}

Jin, J. B. ^{[1
]}

Yu, Q. ^{[2
]}

Wang, X. D. ^{[1
]}

Zhang, D. X. ^{[3
]}

Jiang, Y. ^{[2
]}

Jiang, J. Z. ^{[1
]}

机构：

[1] Zhejiang Univ, ICNSM, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

[2] Univ Nevada, Dept Mech Engn, Reno, NV 89557 USA

[3] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2014年 / 30卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Bulk metallic glass; Tension test; Elastic-plastic deformation; AMORPHOUS-ALLOYS; MECHANICAL-PROPERTIES; FRACTURE; LIQUID; STATE; FLOW;

D O I：

10.1016/j.jmst.2013.12.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tensile elastic behavior of bulk Zr-46(Cu4.5/5.5Ag1/5.5)(46)Al-8 metallic glass was experimentally investigated. It exhibited linear and non-linear time-independent elastic deformation with a demarcative stress of approximately 500 MPa within the timescale in the present work, and repeated loading unloading before yielding did not alter stress strain relationship. The pure linear elastic strain limit is 0.6%, significantly lower than 2% as generally reported, but still much higher than 0.1% observed for typical crystalline alloys. Deviation from linear elastic behavior at stresses higher than 500 MPa is explained here as a macroscopic manifestation of local fluctuations in elastic strain, which becomes pronounced at stresses higher than the critical value. The occurrence of non-linear elasticity is possibly also related to the sinusoidal relationship between shear stress and atomic displacement.

引用

页码：595 / 598

页数：4

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