instantaneous flow stress (Yf/Yf= 60%), please calculate the work hardening exponent “n?(2) At strain = 1.8 ɛ, calculate the ratio of the average flow stress to the instantaneous flow stress(Y/Y;).(3) The flow stress is a function of both strain and strain rate. When temperature increases, how do working hardening exponent 'n’ and strain rate sensitivity exponent ´m’ change?

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