Relating activation of shear transformation zones to β relaxations in metallic glasses

被引：316

作者：

Yu, H. B. ^{[1
]}

Wang, W. H. ^{[1
]}

Bai, H. Y. ^{[1
]}

Wu, Y. ^{[2
]}

Chen, M. W. ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

[3] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 22期

关键词：

MECHANICAL-PROPERTIES; SECONDARY RELAXATION; AMORPHOUS SOLIDS; FORMING LIQUIDS; DEFORMATION; FLOW; PLASTICITY; TRANSITION; POLYMERS; DYNAMICS;

D O I：

10.1103/PhysRevB.81.220201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanisms of plastic deformation of glassy solids and structural origin of beta relaxation are two fundamental issues. We provide compelling experimental evidence that the activation of shear transformation zones (STZs) and beta relaxations in metallic glasses are directly related, and the activation energy of the beta relaxation and the potential-energy barriers of STZs are nearly equivalent. Our results suggest an intrinsic correlation among potential STZs, beta relaxation, and the inhomogeneous atomic structure of metallic glasses, which has implications for understanding the deformation mechanism and structural origin of beta relaxation in glasses.

引用

页数：4

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