Ductilization of BMGs by optimization of nanoparticle dispersion

被引：23

作者：

Hajlaoui, K.

Yavari, A. R.

Das, J.

Vaughan, G.

机构：

[1] Domaine Univ, LTPCM CNRS UA29, F-38402 St Martin Dheres, France

[2] ESRF, F-38042 Grenoble, France

[3] Tech Univ, FG Phys Met, Mat & Geowissensch FB11, Darmstadt, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 434卷 / 6-9期

关键词：

metallic glasses; synchrotron radiation; nanocrystals; shear bands; semi-solid slurry;

D O I：

10.1016/j.jallcom.2006.08.290

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In situ optimized heat treatment in high-energy monochromatic beam of synchrotron light was conduced to generate fine nanoparticle dispersions in Zr-based alloys. Effect of embedded nanocrystals on the mechanical properties of our BMG-composites was investigated by compressive testing at room temperature. We found that the newly created nanostructured composites show good strength at high ductility with no work hardening. Based on TEM observations, a new mechanism was proposed which compensates for shear softening. The nanocrystals initially smaller than the elementary shear band were expected to growth in active shear band during deformation. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：6 / 9

页数：4

共 28 条

[11] Microstructure controlled shear band pattern formation and enhanced plasticity of bulk metallic glasses containing in situ formed ductile phase dendrite dispersions [J].