Using direct extrusion process, a round billet of 100 mm

Home » Materials Science and Manufacturing Engineering » Materials Science and Manufacturing Engineering Miscellaneous » Question

Using direct extrusion process, a round billet of 100 mm length and 50 mm diameter is extruded. Considering an ideal deformation process (no friction and no redundant work) extrusion ratio 4 and average flow stress of material 300 MPa, the pressure (MPa) on the ram will be

1. 416
2. 624
3. 700
4. 832

Correct Option: A

A, L₀ = 100,
σ_y = 300 MPa
d₀ = 50 mm

E.R. =	A₀	= 4, A₀ = 1962.5 mm²
	A₁

Extrusion pressure = 300 in (extrusion ratio) = 415.8 MPa