关键词: 2124 铝合金, 蠕变, 本构方程, 蠕变时效成形

Abstract:

Uniaxial tensile creep ageing experiments of 2124 aluminum alloy specimens were carried out under the stress of 200,225 and 250MPa at 185℃. It is found that,at a constant temperature,the creep behaviors become more distinct with the increase of experimental stress and ageing time. Then,according to the creep theory and the creep curves,a constitutive equation was established and was used to describe the creep behaviors of 2124 aluminum alloy at 185℃ under different stress conditions. Moreover,the constants of the constitutive equation were determined with SPSS and Origin. By comparing the experimental data with the fitting curves,it is concluded that the proposed constitutive equation well describes the creep behaviors of 2124 aluminum alloy at 185 ℃ under different stress conditions.

Key words: 2124 aluminum alloy, creep, constitutive equation, creep age-forming