[Kovove materialy - Metallic materials]
    Wed - November 13, 2024 - 18:51 No. of hits : 1798066 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 38 (2000), Issue 1

Influence of volume fraction of Al2O3 particles on fracture of the Cu-Al2O3 system (in Slovak)
BESTERCI, M., IVAN, J., KOVAC, L.
vol. 38 (2000), no. 1, pp. 21 - 28

Abstract
The influence of volume fraction of Al2O3 particles on fracture of the Cu-Al2O3 system is analysed by "in situ tensile test in SEM". It is shown, that tensile strain produces first micro-cavities on matrix-particle interfaces due to decohesion of particles from the matrix. The cavities grow and coalesce in the first place in the direction of rows of particles with growing strain. Cracks develop in both directions: along the rows and in the direction perpendicular to the rows, leading to final fracture. The deformation at fracture, elongation, is dependent on Al2O3 particle volume fraction. A model explaining the fracture mechanism is introduced.

Key words
SEM, fracture mechanism, dispersion hardening

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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