You r right mate,but my main concern is with compressive force...when we extrude wires we Dont need to keep compressive force for extra time to avoid regaining..but in drawing operation...

In forming operation why does tensile force needs to be kept for some time so that there will be permanent deformation ..where as if forces are compressive there is no...

I had read somewhere that energy obtained due to the droping hammer is double to that of potential energy..can any1 explain with mathematical model??