金属玻璃中流动缺陷与弛豫的微观描述。

Microscopic description of flow defects and relaxation in metallic glasses.

作者信息

Atzmon M, Ju J D

机构信息

Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.

Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.

出版信息

Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Oct;90(4):042313. doi: 10.1103/PhysRevE.90.042313. Epub 2014 Oct 29.

DOI:10.1103/PhysRevE.90.042313

PMID:25375500

Abstract

The anelastic relaxation behavior of amorphous Al86.8Ni3.7Y9.5 was characterized in prolonged, quasistatic measurements, up to 1.1×10(8) s. The size-density distribution of potential shear transformation zones was determined from the data. We derive an expression for the distribution, based on a free-volume criterion for an atomic cluster being a potential shear transformation zone. The model is shown to be consistent with experiment.

摘要

通过长达1.1×10⁸ 秒的长时间准静态测量，对非晶态Al86.8Ni3.7Y9.5的滞弹性弛豫行为进行了表征。根据这些数据确定了潜在剪切转变区的尺寸 - 密度分布。我们基于原子团簇作为潜在剪切转变区的自由体积准则，推导出了该分布的表达式。结果表明该模型与实验结果一致。