Effect of double ageing on performance and establishment of prediction model for 6005 aluminum alloy  

双级时效对6005铝合金性能的影响与预测模型的建立

作　　者：WANG Xu-cheng HUANG Yuan-chun ZHANG Li-hua ZHANG Yun HUANG Shi-ta 王旭成;黄元春;张立华;张昀;黄仕塔(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)

机构地区：[1]State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China [2]College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China [3]Antai New Energy Technology Co.,Ltd.,Zhangzhou 363000,China

出　　处：《Journal of Central South University》2022年第3期973-985,共13页中南大学学报（英文版）

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。

摘　　要：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.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。

关 键 词：Al alloy heat treatment MODEL mechanical performance strengthening mechanism 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG156.92[金属学及工艺—金属材料]