Comparison of ceramic material effects on the flexural Weibull statistics and fracture of high volume fraction particle reinforced aluminum
✍ Scribed by Walter L. Prater
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 941 KB
- Volume
- 420
- Category
- Article
- ISSN
- 0921-5093
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✦ Synopsis
The effects of the ceramic particle material on the flexural Weibull modulus, characteristic flexural strength, and damage parameters of particulatereinforced metal-matrix composites were studied. Three high volume fill composites were fabricated using the pressure infusion casting technique: they were reinforced with SiC, B 4 C, and ␣-Al 2 O 3 particles. Four-point bend testing determined the effects of particle material on flexural strength and elastic modulus. It was found the B 4 C and SiC composites had similar flexural Weibull modulus, low deflection, and similar damage parameters. The ␣-Al 2 O 3 reinforced composite had the largest flexural Weibull modulus, highest deflection at failure, and largest damage parameter. Extensive microstructural and SEM fractographs were taken of the as-processes and fractured specimens. The mechanisms leading to the dominant failure modes are discussed.