Atomic mobility and strain localization in amorphous metals

被引：20

作者：

Delogu, Francesco ^{[1
]}

机构：

[1] Univ Cagliari, Dipartimento Ingn Chim & Mat, I-09123 Cagliari, Italy

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.100.075901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Molecular dynamics simulations are employed to investigate the atomic mobility in Ni50Zr50 amorphous alloys under both static conditions and shearing. Diffusion occurs under static conditions via cooperative stringlike motion involving atoms with large volumes. Atomic mobility is instead governed by rearrangements localized in shear transformation zones (STZs) under shearing. Local atomic volume plays in both cases a key role, the atomic ensembles involved in diffusion and STZ activity being strongly correlated.

引用

页数：4

共 31 条

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[2] MOLECULAR-DYNAMICS SIMULATIONS AT CONSTANT PRESSURE AND-OR TEMPERATURE [J].