발간논문

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Vol.18, No.5, 396 ~ 407, 1980
Title
Creep mechanism of 70Cu - 30Ni Alloy in terms of Effective Stress and Dislocation Structure
홍준화Jun Hwa Hong, 남수우Soo Woo Nam
Abstract
The steady state creep deformation mechanism of 70Cu-30Ni solid solution alloy was investigated for the temperature range of 0.44∼0.64T_m. For the better understanding of the mechanism the effective stress was measured and the creep rate was expressed with the effective stress as ε˙_s=1.84×10^(-4)(σ^*/σ_(0.05))^(2.6) where σ^* and σ_(0.05) are the effective stress and 0.05 strain offset proof stress, respectively. The observed experimental results indicate that the creep deformation mechanism of the given alloy under the stress range of 15∼336㎫ is controlled by the non-conservative motion of the jogged screw dislocations.
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