Why stress-strain diagram is not prepared by compressive
testing instead of testing component by tensile stress?

Answer Posted / nitin

readings are easily taken in tensile stress, no special arrangement is req. to prevent buckling as in compression. Flow stress is a material property depending upon grain size, heat treatment, chemical composition etc. It is the instantaneous stress required for plastic deformation i.e; to keep the material flowing and does not depend upon the type of loading.

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