Fracture Characteristic of Mg-Al-Zn-Al2O3 Composites


Article Preview

One kind of 3DNMMC with different volume fraction reinforcement phase was fabricated by pressureless technique. The bending strength and fracture toughness were tested by 3-P bending strength experiments. When the volume fraction of reinforcement phase phase was not in excess of 10%, composites had an improvement of bending strength and fracture toughness owing to relatively homogeneous Al2O3 particle distribution encircled by metal matrix and the occurrence of interface reaction product as MgAlO2 spinel phase. Much and smaller craters and dimples are observed in metal matrix alloy and limited ductility of composites causes the early failure of composites. With the increases of volume fraction of reinforcement phase phase, crack characteristic consist of crack nucleation, growth, coalescence and crack propagation became the main fracture failure mechanisms.



Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie




H. R. Geng et al., "Fracture Characteristic of Mg-Al-Zn-Al2O3 Composites", Key Engineering Materials, Vols. 353-358, pp. 1378-1381, 2007

Online since:

September 2007




[1] A. Manna and B. Bhattacharayya: J. MATER. PROCESS. TECH. Vol. 140 (2003), p.711.

[2] Zhaowei Zhong and Gguyen Phu Hung: J. MATER. PROCESS. TECH. Vol. 123 (2002), p.13.

[3] L. Lu, M.O. Lai and L. Froyen: Key Eng. Mater. Vol. 230 (2002), p.287.

[4] Taha Mohamed A.: Materials and Design Vol. 22 (2001), p.431.

[5] Salzar Robert S.: Composites Part B: Engineering Vol. 29 (1998), p.235.

[6] M. HOFFMAN, S. SKIRL, W. POMPE and J. ROEDEL. Acta Mater. Vol. 47 (1999), p.565.

[7] L.D. Wegner and L.J. Gibson: International Journal of Mechanical Sciences Vol. 2 (2004), p.925.

[8] P. Cavaliere: Composites Part A Vol. 236(2005), p.1657.