Acoustic emissions analysis of damage in amorphous and crystalline metal foams

被引：25

作者：

Brothers, A. H.

Prine, D. W.

Dunand, D. C. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[2] Northwestern Univ, Infrastruct Technol Inst, Evanston, IL 60208 USA

来源：

INTERMETALLICS | 2006年 / 14卷 / 8-9期

关键词：

brittleness and ductility; glasses; metallic; mechanical testing;

D O I：

10.1016/j.intermet.2006.01.029

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：

Acoustic emission methods are used to investigate the nature and evolution of microfracture damage during uniaxial compression of ductile amorphous and brittle crystalline metal foams made from a commercial Zr-based bulk metallic glass, and to compare this behavior against that of 14 aluminum-based foam of similar structure. For the amorphous foam, acoustic activity reveals evolution of the damage process from diffuse to localized damage through the foam stress plateau region, and reversion back towards diffuse damage in the foam densification region. Accommodation of microfracture by surrounding ductile struts, and significant point contact formation, permit high average compressive strains of ca. 80% in the amorphous foam without macroscopic failure. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：857 / 865

页数：9

共 36 条

[31] Synthesis method for amorphous metallic foam [J].