A model for precipitation kinetics and strengthening in Al-Cu-Mg alloys

作者：Khan I N^*; Starink M J; Yan J L

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2008, 472(1-2): 66-74.

DOI：10.1016/j.msea.2007.03.033

• aluminium alloys
• ageing
• modelling
• precipitation kinetics
• co-clusters

A physically based numerical model is developed to predict the microstructural evolution and strengthening in Al-Cu-Mg alloys during isothermal treatments. The modelling of the formation kinetics of the precipitates is based on the Kampmann and Wagner model. The strengthening by the shearable Cu:Mg co-clusters is modelled on the basis of modulus strengthening mechanism and the strengthening by the non-shearable S phase precipitates is based on the Orowan looping mechanism. The model predictions are verified by comparing with the strength and differential isothermal calorimetery data on 2024-T351 aluminium alloys. The microstructural development and strength predictions of the model are generally in good agreement with the experimental data.

• 出版日期2008-1-15