Answer / ravi kumar singh

at the stage of upper yield point the plastic flow in
the material is less than the lower yield point so
stress decreases to upper to lower yield point

Answer / mathavan.s

material property will be change

Answer / abhishek tiwari

due to the tensile stress on the material.

Answer / amritdeep singh

because in upper position the yield point goes to elastic position so the stress is decrease from upper yield to lower yield

Answer / majid

tensile stress

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