(Solved): A cylindrical specimen of a metal alloy 50.5 mm long and 9.72 mm in diameter is stressed in tension. ...

A cylindrical specimen of a metal alloy 50.5 mm long and 9.72 mm in diameter is stressed in tension. A true stress of 387 MPa causes the specimen to plastically elongate to a length of 51.2 mm . If it is known that the strain-hardening exponent for this alloy is 0.2 , calculate the true stress (in MPa ) necessary to plastically elongate a specimen of this same material from a length of 50.5 mm to a length of 59.6 mm . MP