摘要
本文对6005挤压铝合金进行双级时效热处理,研究6005铝合金在不同时效制度下的组织演变规律和力学性能,建立了预时效制度对6005铝合金力学性能的预测模型。研究结果表明,在较高的预时效温度和较短的预时效时间状态下,6005铝合金的性能优于T6态。TEM观察结果表明,在160℃和200℃预时效状态下,合金存在较高的位错密度和析出相密度,与模型预测结果吻合。
In the present investigation, the relation of pre-ageing temperature and pre-ageing time to mechanical properties was studied, and a model was established to predict the mechanical properties of AA6005 Al alloy. Compared with the experimental results, the deviation of the proposed model was limited to 8.1%, which showed reasonable accuracy of forecasting. It was found that the performance of AA6005 alloy was better at higher pre-ageing temperature with shorter pre-ageing time than that at T6 temper. The microstructure of the alloy was observed by transmission electron microscopy, and the results showed that high dislocation density and precipitate density existed at 160 ℃ and 200 ℃ pre-ageing, which were in good agreement with the model.
作者
王旭成
黄元春
张立华
张昀
黄仕塔
WANG Xu-cheng;HUANG Yuan-chun;ZHANG Li-hua;ZHANG Yun;HUANG Shi-ta(State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China;College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;Antai New Energy Technology Co.,Ltd.,Zhangzhou 363000,China)
基金
Projects(51575539, U1837207) supported by the National Natural Science Foundation of China
Project(2020RC2002)supported by the Science and Technology Innovation Program of Hunan Province,China
Project(2021JJ40774)supported by Natural Science Foundation of Hunan Province,China。
关键词
铝合金
热处理
预测模型
力学性能
强化机制
Al alloy
heat treatment
model
mechanical performance
strengthening mechanism
