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In open die forging process, homogenous deformation of billet has occurred with uniform increase in its diameter.

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in Casting-Forming-Welding II by (119k points)
In open die forging process, homogenous deformation of billet has occurred with uniform increase in its diameter.

(a) True

(b) False

The question was posed to me in unit test.

My question is based upon Forging topic in chapter Types of Die & Metal Forming Processes of Casting-Forming-Welding II

1 Answer

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Correct choice is (b) False

The explanation is: In open die forging process, the deformation is not homogenous as bulging occurs due to the presence of friction at the interface of die and billet. This friction opposes the motion of billet; this effect is generally called as barreling effect. Homogenous deformation only occurs when the friction is zero, which is an ideal condition for the forging process.

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