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In general, the coefficient of friction is very low in the metal forming processes.

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in Casting-Forming-Welding II by (119k points)
In general, the coefficient of friction is very low in the metal forming processes.

(a) True

(b) False

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Query is from Behaviour in Metal Forming topic in section Forming Process of Casting-Forming-Welding II

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Right choice is (b) False

Best explanation: In metal forming processes, the coefficient of friction is very high. Due to this, it leads to a condition which is called as sticking friction. In this case, the surface shear stress increases the shear yield strength of the metal and the surfaces adhere to each other. In the forming operation, the metal beneath the surface experiences shear deformation.

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