The influence of SiC particles on the compressive properties of metal matrix composites
| Autor: | Mirjana Mitkov, Dusan Bozic, Z̆aklina Gnjidić |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
Alloy Nucleation 02 engineering and technology engineering.material Hot pressing composites 01 natural sciences hot pressing 0103 physical sciences General Materials Science Composite material Ductility Elastic modulus 010302 applied physics Mechanical Engineering aging 021001 nanoscience & nanotechnology Condensed Matter Physics Cracking Compressive strength Mechanics of Materials aluminum engineering Dislocation 0210 nano-technology |
| Zdroj: | Materials Characterization |
| ISSN: | 1044-5803 |
| DOI: | 10.1016/s1044-5803(01)00161-9 |
| Popis: | Room temperature compressive tests have been carried out on three metal matrix composites (MMCs), all based on the Al alloy CW67 and on monolithic material. The composites, CW67 alloy reinforced with homogeneously distributed SiC particles in three nominal sizes 0.7, 15 and 33 mum, were produced by hot pressing up to the theoretical density. The addition of the SiC particles increased the yield strength and elastic modulus while decreasing the ultimate compressive strength and ductility of the CW67 alloy in both the peak-aged and under-aged conditions. The greatest strengthening effects were achieved with the CW67-15 mum SiC composite material. Both the presence of agglomerations of small (0.7 pm) SiC particles and the cracking of large (33 mum) SiC particles had detrimental effects on CW67 alloy strengthening. The higher compressive strength and lower ductility were achieved with the peak-aged matrix compared with the under-aged matrix. The presence of SiC particles causes the aging process to be accelerated due to an increase in dislocation density, which provides more sites for the nucleation of precipitates. (C) 2001 Elsevier Science Inc. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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