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

Abstract

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 °C and 200 °C pre-ageing, which were in good agreement with the model.

Keywords

Al alloy / heat treatment / model / mechanical performance / strengthening mechanism

References

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