Journal
MATERIALS SCIENCE AND TECHNOLOGY
Volume 24, Issue 12, Pages 1403-1410Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/174328408X317020
Keywords
Aluminium alloys; Ageing; Modelling; Phase transformations; Co-clusters
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A model is developed to predict the precipitation kinetics and strengthening in Al-Cu-Mg alloys during non-isothermal treatments consisting of controlled heating and cooling. The prediction of the precipitation kinetics is based on the Kampmann and Wagner model. The precipitation strengthening by the shearable Cu-Mg co-clusters is modelled on the basis of the 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 hardness, transmission electron microscopy and differential scanning calorimetry data on 2024-T351 aluminium alloys. The microstructural development and strength predictions of the model are generally in close agreement with the experimental data.
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