Influence of Al2O3 particles volume fraction on fracture mechanism in the Cu-Al2O3 system

被引：22

作者：

Besterci, M

Ivan, J

Kovac, L

机构：

[1] Slovak Acad Sci, Inst Mat Res, Kosice 04353, Slovakia

[2] SAS, Inst Mat & Mech Machines, Bratislava 83008, Slovakia

来源：

MATERIALS LETTERS | 2000年 / 46卷 / 2-3期

关键词：

fracture mechanism; in situ tensile test in SEM; Cu-Al2O3; dispersion-strengthened system;

D O I：

10.1016/S0167-577X(00)00164-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of Al2O3 particles volume fraction on the fracture mechanism in the Cu-Al2O3 system is analyzed by "in situ tensile test in SEM". It is shown that tensile strain first produces microcavities on matrix-particle interfaces due to decohesion of particles from the matrix. The cavities grow and coalesce first in the direction of rows of particles with growing strain. Cracks develop in both directions: in the rows, and in the direction perpendicular to the rows, leading to final fracture. The deformation value at fracture is dependent on Al2O3 particle volume fraction. A model explaining the fracture mechanism is introduced. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：181 / 184

页数：4