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Fracture and Fatigue of Titanium Metal Matrix Composites

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Outer diameter, inner diameter, overall length, and overall thickness are important dimensions. Most materials are cast, wrought, extruded, forged, cold-finished, hot-rolled, or formed by compacting powdered metals or alloys. Performance features for titanium and titanium alloys include resistance to corrosion, heat, and wear. Ti MMCs offer provide potential advantages for structural applications, where they combine the high strength, high temperature capability, and oxidation resistance of titanium with an increase in stiffness provided by the ceramic reinforcement. Another thing is that they have the advantage of being isotropic in behavior, cheaper to manufacture and more amenable to subsequent processing and component forming operations.

Of all the potential reinforcing phases for titanium which includes TiB, TiB2, SiC, Al2O3, and TiC, TiB offers the best balance of stiffness, stability, and similarity of thermal expansion coefficients. Other properties, such as the strength of metal matrix composites, depend in a much more complex manner on composite microstructure. The strength of a fiber-reinforced composite, for example, is determined by fracture processes, themselves governed by a combination of micro structural phenomena and features. These include plastic deformation of the matrix, the presence of brittle phases in the matrix, the strength of the interface, the distribution of flaws in the reinforcement, and the distribution of the reinforcement within the composite.

Thus in this way the properties of Ti MMCs have been taken into consideration. Now let’s consider the idea of reinforcements. Basically reinforcements used in metal matrix composites fall under the following categories. They are continuous fibers, short fibers, whiskers, equiaxed particles, and interconnected networks. In continuous fibers when we consider the case of monofilaments, silicon carbide monofilament comes into picture. Silicon carbide monofilaments are made by a process called chemical vapor deposition in which tungsten or carbon core is used.

If we look at the commercial product, a Japanese multifilament yarn which is designated as silicon carbide by the manufacturers is available. However this is made of pryolosis of organo- metallic precursor fiber and thus it is not a pure silicon carbide. This can be attributed by the fact that the properties differ significantly from those of monofilament silicon carbide.

Now we will consider the concept of linear elastic concept mechanics.

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preview essay on Fracture and Fatigue of Titanium Metal Matrix Composites
  • Pages: 4 (1000 words)
  • Document Type: Essay
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