4. For eutectoid steel: a). Sketch the thermal history (i.e., path) and calculat

Question

4. For eutectoid steel:

a). Sketch the thermal history (i.e., path) and calculate the final microstructure when the steel has the following heat treatment sequence: i) instantaneously quenched from 850 °C to 600 °C, ii) held at 600 °C for 5 seconds, and iii) quenched instantaneously to 20 °C.

b). Sketch the thermal history (i.e., path) and calculate the final microstructure when the steel has the following heat treatment sequence: i) instantaneously quenched from 850 °C to 300 °C, ii) held at 300 °C for 1 hour, and iii) quenched instantaneously to 20 °C.

7.

a). Among multiple components of a composite material, at least two components have to serve for specific functions. What are these two components? What are these two specific function?

b). Give an example of engineering application (not household items), where ceramics will be good materials to choose and high alloy steel will not be a good material to choose. Explain your reasons.

c). Give an example of engineering application (not household items), where polymers will be good materials to choose and composites will not be a good material to choose. Explain your reasons.

8.

a). Among many polymer processes, which processes can be usefor thermoplastics? Can they be used to process thermosetting polymers? Explain your reasons.

b). Engineering designers select thermosetting polymers to make electrical components. Explain why not use thermoplastic polymers.

c). PVC popes are widely used in commercial and residential construction, what does PVC stands for?

Explanation / Answer

Dude this question is from Metallurgy. Post it there and in way answering through mechanical also we can find the entire history

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