Effect of temperature and strain rate on deformation behavior in metallic glassy films

被引：20
|
作者：
Cao, Q. P. [1 ]
Ma, Y.
Wang, C.
Wang, X. D.
Jiang, J. Z.
机构：
[1] Zhejiang Univ, ICNSM, Hangzhou 310027, Zhejiang, Peoples R China
来源：
THIN SOLID FILMS | 2014年 / 561卷
基金：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
Metallic glasses; Temperature; Strain rate; Shear band; Non-localized deformation; MECHANICAL-BEHAVIOR; ELASTIC PROPERTIES; POISSONS RATIO; COMPRESSION; STRENGTH; FLOW; STATE; MODE;
D O I：
10.1016/j.tsf.2013.05.176
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Both the effects of temperature and strain rate on the deformation behavior of metallic glass thin films (Ni60Nb40, Cu44Zr44Al12 and Zr55Cu51Ni13Al17) were systematically investigated. The evolution of surface morphology of magnetron sputtered thin films co-bent with the Ti substrate was monitored. A transition from highly localized deformation to non-localized deformation was observed at various temperatures and strain rates by reducing the film thickness to a critical thickness, which can be understood on the basis of Young's modulus, Poisson's ratio, Griffith's crack-propagation criterion and elastic energy transferring efficiency of the material. Temperature and strain rate dependence of the critical thickness for transition are discussed to shed light on the deformation mechanism of glassy thin films. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：60 / 69
页数：10
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