純銅圧延板の塑性変形に伴う超音波速度変化

概要

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The ultrasonic velocity change with plastic deformation in rolled copper was investigated. All velocities decreased and their anisotropy developed with the plastic strain. The summation of squared velocities decreased, and then it returned to the initial value by annealing. The behavior of the summation was considered to be the reflection of multiplication and disappearance of dislocations. The anisotropy was explained by the change of texture. The ODCs (orientation distribution coefficients) in annealed sample were estimated, and the engineering elastic constants were calculated. The ODCs showed a decrease in Young's moduli and an increase in shear moduli.
2004-12-15