In open die forging process, homogenous deformation of billet has occurred with uniform increase in its diameter.(a) True(b) FalseThe 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

In open die forging process, homogenous deformation of billet has occu

1.	In open die forging process, homogenous deformation of billet has occurred with uniform increase in its diameter.(a) True(b) FalseThe 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
Answer» 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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