A tensile test is carried out to determine the strength constant C and strain-rate sensitivity exponent m for a certain metal at 1000°F. At a strain r
A tensile test is carried out to determine the strength constant C and strain-rate sensitivity exponent m for a certain metal at 1000°F. At a strain rate = 10/sec, the stress is measured at 23,000 lb/in2 ; and at a strain rate = 300/sec, the stress = 45,000 lb/in2 . (a) Determine C and m. (b) If the temperature were 900°F, what changes would you expect in the values of C and m?
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