摘要
为表征2124铝合金的蠕变时效行为,在不同温度和应力状态下进行了一系列蠕变时效实验,并对时效过程中试样的微观组织与力学性能进行了观测.基于实验结果并结合对蠕变机制与时效强化的考虑,建立了适用于2124铝合金的蠕变时效的统一本构模型.模型不仅将宏观的本构关系、力学性能以及微观结构紧密联系起来,而且能够适用于不同的时效温度和应力状态.最后应用模型预测了另一温度下不同应力状态的蠕变应变曲线,与实验结果吻合很好.
A series of creep ageing tests under different temperatures and stresses have been designed to characterize the creep aging behavior of 2124 Al alloy, and the microstructure and properties of the samples in the interrupted tests have been observed. On the basis of the experimental results, combining the creep mechanism and age strengthening theory, a unified constitutive model has been developed for creep age forming of 2124 Al alloy. The constitutive relations, aging strengthening effect and the microstructure are closely correlated in the model, which could be suitable for different ageing temperatures and stress levels. Finally, the model has been used to predict the creep strain curves of added creep aging tests with different temperature, the computed results tally well with the experimental data.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第3期379-384,共6页
Acta Metallurgica Sinica
基金
国家重点基础研究发展计划资助项目2010CB731700~~
