Influence of Crystalline Nanoprecipitates on Shear-Band Propagation in Cu-Zr-Based Metallic Glasses

被引：55

作者：

Brink, Tobias ^{[1
]}

Peterlechner, Martin ^{[2
]}

Roesner, Harald ^{[2
]}

Albe, Karsten ^{[1
]}

Wilde, Gerhard ^{[2
]}

机构：

[1] Tech Univ Darmstadt, Inst Mat Wissensch, Fachgebiet Mat Modellierung, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany

[2] Univ Munster, Inst Mat Phys, Wilhelm Klemm Str 10, D-48149 Munster, Germany

来源：

PHYSICAL REVIEW APPLIED | 2016年 / 5卷 / 05期

关键词：

IMPROVED MECHANICAL-BEHAVIOR; MATRIX COMPOSITES; INDUCED PLASTICITY; DEFORMATION; MICROSTRUCTURE; MARTENSITE; PHASE; IMPROVEMENT; DUCTILITY; DENSITY;

D O I：

10.1103/PhysRevApplied.5.054005

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The interaction of shear bands with crystalline nanoprecipitates in Cu-Zr-based metallic glasses is investigated by a combination of high-resolution TEM imaging and molecular-dynamics computer simulations. Our results reveal different interaction mechanisms: Shear bands can dissolve precipitates, can wrap around crystalline obstacles, or can be blocked depending on the size and density of the precipitates. If the crystalline phase has a low yield strength, we also observe slip transfer through the precipitate. Based on the computational results and experimental findings, a qualitative mechanism map is proposed that categorizes the various processes as a function of the critical stress for dislocation nucleation, precipitate size, and distance.

引用

页数：16

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