**5. References**


Paris law. It becomes, therefore, evident that lock-in thermography has a great potential for

Finally, cyclic deformation data reveals that metallic foam sandwich panel samples do not produce consistent results with acceptable repeatability of results but by using calculated crack propagation life data and experimental data for both aluminium honeycomb and metallic foam sandwich panels a method of analysis has been proposed to predict fatigue

[1] K.G. Kreider, Composite Materials, in: Metallic Matrix Composites, Volume 4, Academic

[2] D.J. Lloyd, Particle Reinforced Aluminium and Magnesium Matrix Composites, Int.

[3] N.F. Mott and F.R.N. Nabarro, An attempt to estimate the degree of precipitation

[4] H.B. Aaron and H.I. Aaronson, Growth of grain boundary precipitates in Al-4% Cu by

[5] H.B. Aaron, D. Fainstein and G.R. Kotler, Diffusion-Limited Phase Transformations: A

[6] H.R. Shercliff and M.F. Ashby, A process model for age hardening of aluminium alloys -

[7] R.A. Carolan and R.G. Faulkner, Grain boundary precipitation of M23C6 in an austenitic

[8] S.T. Hasan, J.H. Beynon and R.G. Faulkner, Role of segregation and precipitates on

[9] M. Manoharan and J.J. Lewandowski, In-situ Deformation Studies of an Aluminum

[10] M. Manoharan and J.J. Lewandowski, Effect of Reinforcement Size and Matrix

[11] S.T. Hasan, Effect of heat treatment on interfacial strengthening mechanisms of second

[13] G. Rozak, J.J. Lewandowski, J.F. Wallace and A. Altmisoglu, Effects of Casting

[14] Bitzer T.1997 Honeycomb Technology: materials, design, manufacturing, applications

Comparison and Critical Evaluation of the Mathematical Approximations, J. Appl.

interfacial strengthening mechanisms in SiC reinforced aluminium alloy when subjected to thermomechanical processing, J. Mater. Process. Technol. 153-154, 757-

Metal-Matrix Composite in a Scanning Electron Microscope, Scr. Metall. 23, 1801-

Microstructure on the Fracture Properties of an Aluminum Metal-Matrix

phase particulate reinforced aluminium alloy, 14th International Metallurgical and Materials Conference (Metal 2005), Hradec nad Moravici, Czech Republic, (2005). [12] J.J. Lewandowski, C. Liu and W.H. Hunt Jr., Effects of Microstructure and Particle

Clustering on Fracture of an Aluminum Metal Matrix Composite, Mater. Sci. Eng.

Conditions and Deformation Processing on A356 Aluminum and A356-20% SiC

hardening, with a simple model, Proc Phys Soc 52, 85 (1940).

interfacial diffusion, Acta Meter. 16, 789 (1968).

I. The model, Acta Mater. 38, 1789-1802 (1990).

Composite, Mater. Sci. Eng. A 150, 179-186 (1992).

Composites, J. Compos. Mater. 26(14), 2076-2106 (1992).

evaluating nondestructively the fracture behaviour of metallic composite materials.

life of metallic foam sandwich panels.

Press, New York and London (1974).

Mater. Rev. 39, 1-23 (1994).

Phys. 41(11), 4404-4410 (1970).

763 (2004).

1804 (1989).

A 107, 241-255 (1989).

[15] Alulight International GmbH

and testing. Chapman & Hall.

steel, Acta Mater. 36, 257-266 (1988).

**5. References** 


**16** 

*1Saudi Arabi* 

*2Iran* 

**Corrosion Behavior of** 

*1Mechanical Engineering Department,* 

**Aluminium Metal Matrix Composite** 

Zaki Ahmad1, Amir Farzaneh2 and B. J. Abdul Aleem1

Metal matrix composite (MMC) is a material which consists of metal alloys reinforced with continuous, discontinuous fibers, whiskers or particulates, the end properties of which are intermediate between the alloy and reinforcement (Schwartz, 1997). These materials have remained the focus of attention of aerospace, automobile and mineral processing industry because of the several advantages they offer which include high strength to weight ratio, elevated temperature toughness, low density, high stiffness and high strength compared to its monolithic counterpart (the original alloy). The particle reinforced metal matrix composites (PRMMC) satisfy many requirements for performance driven applications in aerospace, automobile and electrical industry. The particle reinforced composites can be tailored and engineered with specific required properties for specific application. The commonly used reinforcing materials are silicon carbide, aluminium oxide and graphite in the form of particles and whiskers. Nominal compositions of some well known alloys which are reinforced with whiskers, fibers or particulate is shown table 1. Figure 1 shows that

Si Fe Cu Mn Mg Cr Zn Ti Al

<sup>6061</sup>0.62 0.23 0.22 0.03 0.84 0.22 0.10 0.1 Bal

<sup>7075</sup>0.40 0.50 0.60 0.30 2.5 0.15 5.5 0.2 Bal

<sup>6013</sup>0.6 0.50 1.1 0.2 0.8 0.1 0.25 01 Bal

MMC can be continuous or discontinuous. Discontinuous MMC can be isotropic and can be worked with standard metal working techniques such as extrusion, forging or rolling.

Table 1. Nominal composition of some well known alloys reinforced with whiskers and

microhardness increases with an increase in filler content of the composites.

**1. Introduction** 

Al

Al

Al

particles

*King Fahd University of Petroleum & Minerals, Dhahran, 2Department of Metals, International Center for Science, High Technology and Environmental Sciences, Kerman,* 

