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Mechanical Forming

Mechanical Forming

12.12.2014

Wrought forming refers to shaping metals by mechanical deformation. This includes bending, forging, stamping, and many other deformation operations. We have seen that the typical stress-strain curve taken at room temperature slopes upwards. If we are part way up the curve, we would describe the current sample as stronger than when the test began, since it now possesses a higher yield strength. It is also more brittle, in that it now requires less strain to fracture than the original sample. This phenomenon is called strain hardening or work hardening, and when it occurs, the process is called cold working.