Bending Properties of Al-Steel and Steel-Steel Composite Metal Foams

被引：50

作者：

Brown, Judith A. ^{[1
]}

Vendra, Lakshmi J. ^{[1
]}

Rabiei, Afsaneh ^{[1
,2
]}

机构：

[1] N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA

[2] N Carolina State Univ, Dept Biomed Engn, Raleigh, NC 27695 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2010年 / 41A卷 / 11期

基金：

美国国家科学基金会;

关键词：

ACOUSTIC-EMISSION; BEHAVIOR;

D O I：

10.1007/s11661-010-0343-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The performance of new composite metal foams (CMFs) under bending was evaluated with simultaneous acoustic emission (AE) monitoring on samples processed by cast and powder metallurgy (PM) techniques. The results showed high maximum strength in all samples up to 86 MPa with more ductile failure in PM samples. Acoustic emission behavior confirmed that the dominating failure mechanism of cast CMF is the brittle fracture of intermetallic phases that mostly exist at the interface of the steel spheres with the aluminum matrix, whereas in PM samples (100 pct steel), the failure is governed by the propagation of preexisting microporosities in the matrix resulting in a complete ductile failure. SEM imaging of the fracture surfaces supported these findings.

引用

页码：2784 / 2793

页数：10

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