2. Two tension tests were made on the same alloy, but at different strain rates. Both curves were fitted to a power law strain hardening expression of the form, o = Ken. The results are summarized as follows. Assuming that the flow stress at constant strain can be approximated by o = Cam, determine the value of m. Strain rate (S-) Strain hardening exponent, n Constant, K (MPa) Test A 2 x 10-3 0.22 402 Test B 10-1 0.22 412