Failure Mechanisms of a SiC Particles/2024Al Composite under Dynamic Loading

Autor:	Y. X. Lu, X. M. Meng, C. S. Lee, R. K. Y. Li, C. G. Huang
Rok vydání:	1998
Předmět:	Scanning electron microscope Composite number Metal matrix composite chemistry.chemical_element Fractography Condensed Matter Physics Microstructure Electronic Optical and Magnetic Materials stomatognathic system chemistry Aluminium Tearing Composite material Tensile testing
Zdroj:	physica status solidi (a). 169:49-55
ISSN:	1521-396X 0031-8965
DOI:	10.1002/(sici)1521-396x(199809)169:1<49::aid-pssa49>3.0.co;2-9
Popis:	Dynamic mechanical response of a 20 vol% silicon carbide particles (SiCp) reinforced 2024 Al composite prepared by powder metallurgy techniques were studied with a split Hopkinson bar. The fracture mechanisms and the deformation microstructure were examined with Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The present results indicate that the composite has a strong SiC-Al interfacial bonding; failure of the material is mainly caused by fracture of SiC particles and tearing failure of the SiC-Al interface. This failure by interface tearing with adhesion of an aluminium layer on SiC particles on the fracture surfaces has not been reported in SiC particle-reinforced aluminium composites. High-resolution transmission electron microscopy studies showed that many of the SiC-Al interfaces have coincident site lattice structures, which are considered to make a significant contribution to the strong interfacial bonding.
Databáze:	OpenAIRE
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