FG materials.pptx

aaaaaaaaaaa

1. What FGM? In materials system, Functionally Graded Materials (FGMs) can be characterized by the variation in composition and structure gradually over volume, resulting in corresponding changes in the properties of the material. Most promising challenge to take advantage of new functionalities of light weight materials. FG materials are designed for specific function and applications A Typical Example of Tungsten-copper FGM

2. Two Types of FGM Property variation Particle reinforced FGM

3. How differ from conventional composite? Conventional Composite FGMs Internal Structure Variation of Elastic and Thermal properties over Cross-section Matrix material Reinforcement

4. Performances of conventional fiber reinforced composites are challenged in thermomechanical loading, when development of interlaminar stresses at the interface becomes the weakest link of the components. Development of functionally graded materials (FGMs) could lead to the reduction of such interlaminar failures, especially at high temperature applications. FGMs allow better customization and tailoring of mechanical properties for special task. Provides more varieties for material selection for engineering design.

5. Why FGMs? Large number of engineering structural components and tools require material Performance by varying with location. The body of gear must be tough, whereas its surface must be hard and wear resistance. A knife needs only to be hard at its cutting edge, elsewhere the material must be strong and tough. By functional gradation of constituents stress concentration and thermal stress can be controlled at the critical locations.

6. Multi material toothbrush Multi material waterproof camera Multi material razor Why Not Multi-Material Structure?

7. Smooth and continuous variation of materials Light weight Thermal stress relaxation High heat and wear resistance Breakage resistance Minimization of interfacial stresses Advantages over Multi-Materials

8. Evolution of Material System Metals and Non-metals Alloys Composites Functionally Graded Materials