발간논문

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Vol.23, No.11, 1206 ~ 1212, 1985
Title
Investigation of the Strain Burst Phenomenon of Cu - 25Ni Alloy due to Cyclic Creep Deformation
류재화J . H . Ryu, 남수우S . W . Nam
Abstract
The phenomenon of strain burst is observed in Cu-25Ni alloy subjected to cyclic creep at intermediate temperature (0.45-0.55 Tm) and high stress however in static creep under the same condition, strain burst is never occurred. The purpose of this work is to study the tendency and mechanism of the strain burst. Strain bursts occur frequently as the temperature and stress are increased, but at low stresses or high temperatures the strain burst is not observed. The strain burst can be seemingly explained as follows: in cyclic creep the localized dislocation network spacing growth is occurred by recovery during cyclic unloading, on reloading instantaneous large increase in mobile dislocation density caused by destruction of grown dislocation network spacing results in strain burst.
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