Mechanical and Fracture Behaviors of (Al2O3+SiCp)/AZ91 Hybrid Mg Matrix Composite

Abstract:

Article Preview

Hybrid AZ91 Mg matrix composites reinforced with ceramic short fiber (Al2O3) and particle (Si or SiCp) were fabricated by squeeze casting method. Microstructure of hybrid Mg matrix was examined and mechanical and fracture properties were characterized. It was found that squeeze casting is effective method for the fabrication of hybrid Mg matrix composites with fairly well distributed reinforcement and near defect-free solidification microstructure. Strength and wear resistance were enhanced with hybridization of reinforcements. To investigate fracture properties of hybrid Mg matrix composites, in-situ micro-fracture experiment was performed in SEM. Crack was initiated and propagated mainly by decohesion of interfaces between Mg matrix and reinforcements. Large ceramic particles tend to fracture and thus seem to be undesirable for mechanical and fracture behavior of hybrid Mg matrix composites.

Info:

Periodical:

Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi

Pages:

653-656

Citation:

I. M. Park et al., "Mechanical and Fracture Behaviors of (Al2O3+SiCp)/AZ91 Hybrid Mg Matrix Composite", Materials Science Forum, Vols. 449-452, pp. 653-656, 2004

Online since:

March 2004

Export:

Price:

$38.00

[1] John E. Allison and Gerald S. Cole: JOM Vol. 1 (1993), p.19.

[2] E. Jeon, M. Kim, I. Choi, K. Cho and I. Park: Proc. of the 2nd Pacific Rim Intern. Conf. on Advanced Materials and Processing (1995), p.2675.

[3] I. Horsfall and S. I Cundy: Ceram. Eng. Sci. Proc. 13 (1992), p.605.

[4] A. Matin, and J. Llorca: Mater. Sci. Eng. Vol. A201 (1995), p.77.

[5] I. M. Park, I. D. Choi and K. M. Cho: Proceedings of the 3rd Korea-China Joint Workshop on Advanced Materials-Transportation Materials, Cheju, Korea (1999), p.138.

[6] Y. G. Cho, S. Y. Kim, I. M. Park and K. M. Cho: TMS, Orlando, USA (1997), p. 98l.

[7] David A. Rigney: Fudamentals of Friction and Wear of Materials, ASM (1980), p.13, 43, 187.

Fetching data from Crossref.
This may take some time to load.