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Types of Extrusion Process

Semi brittle ...

Question

Semi brittle materials can be extruded by

A

impact extrusion

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B

closed cavity extrusion

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C

hydrostatic extrusion

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D

backward extrusion

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Solution

The correct option is C hydrostatic extrusion
Hydrostatic pressure increases the ductility of the material and also there is no friction to overcome along the container walls.

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Q. Assertion :Brittle materials do not exhibit an identifiable yield point; rather, they fail by brittle fracture. Reason: The value of the largest stress in tension and compression defines the ultimate strength.

Q. Assertion :Brittle materials, which includes cast iron, glass, and stone, are characterized by the fact that rupture occurs without any noticeable prior change in the rate of elongation. Reason: There is no neck formation in stress strain curve for brittle material.

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