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Typical tension test for a typical metal

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Reference no: EM13887224

Orowan showed that the shear strain rate is given by γ?  = dγ /dt = ρbv,  where ρ is the dislocation density and v is the average velocity of the dislocation. In a tension test, the tensile strain rate, ε?, is half of the shear strain rate, γ? (ε? = (1/2)γ?. If the Schmid factor = 1/2; otherwise ε? (1/2)γ? . In a typical tension test, the crosshead rate is 0.2 in./min and the gauge section is 2 in. in length. Estimate v in a typical tension test for a typical metal with an initial dislocation density of 1010/cm2.

Reference no: EM13887224

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