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Regarding the fracture mechanism of metals, polymers and ceramics (a) Explain why FCC metals show a ductile...

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Mechanical Engineering

Regarding the fracture mechanism of metals, polymers andceramics

(a) Explain why FCC metals show a ductile fracture even at lowtemperatures while BCC metals do not.

(b) What is crazing? What can you say about the Poisson’s ratioof the crazed material?

(c) Generally, in ceramics, intergranular fracture is preferredto cleavage fracture; however, in metals, transgranular fracture isthe preferred mechanism for brittle failure. Why? Use a physicalreason supported with an equation in your answer.

Answer & Explanation Solved by verified expert
3.9 Ratings (567 Votes)
a Ductility means the ability to get plastically deformed Plastic deformation happens by movement of slip plane in some favourable slip direction The number of slip systems in ACC is    See Answer
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