발간논문

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Vol.19, No.9, 720 ~ 724, 1981
Title
Creep Deformation Characteristics of Aluminum in terms of Effective Stress
진근찬Keun Chan Jin, 신동혁Dong Hyuk Shin, 남수우Soo Woo Nam
Abstract
Primary creep tests were performed on commercially pure aluminum in the temperature range of 0.32 - 0.38 T_m. The activation energies were obtained by usual method using different specimens (Q_c) and the temperature cycling method (Q_(T.C.)). The relation of activation energy with effective stress, σ_e, has been analysed. The activation length, ℓ_c^*, obtained from Q_c is linearly proportional to the inverse of affective stress. But no such relationship is observed in ℓ_(T.C).^* obtained from Q_(T.C.). The Q_c seems to have better physical meaning compared to Q_(T.C).
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