Suppression of the shear band instability during plastic flow of nanometer-scale confined metallic glasses

被引：160

作者：

Donohue, A. ^{[2
]}

Spaepen, F. ^{[2
]}

Hoagland, R. G. ^{[1
]}

Misra, A. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Harvard Univ, Cambridge, MA 02138 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 24期

关键词：

D O I：

10.1063/1.2821227

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The shear band instability that occurs during plastic deformation of metallic glasses limits the application of these high-strength materials. We show that this instability can be suppressed in nanometer-scale metallic glasses constrained by ultrafine crystalline layers. Free-standing Cu/amorphous Pd0.77Si0.23 multilayers consisting either of 10/90 nm glass/Cu or 100/100 nm glass/Cu were deformed to layer thickness reductions greater than 75% by cold rolling or bending, respectively. Transmission electron microscopy showed uniform reduction in the layer thickness with no shear band formation in the amorphous layers. The mechanisms that allow homogeneous codeformation of metallic glasses with nanoscale crystalline layers at high stresses are discussed. (C) 2007 American Institute of Physics.

引用

页数：3

共 24 条

[1] Dislocation dynamics analysis of dislocation intersections in nanoscale metallic multilayered composites [J].