A multi-mechanistic model for precipitation strengthening in Al-Cu-Mg alloys during non-isothermal heat treatments


Khan, I.N. and Starink, M.J., (2006) A multi-mechanistic model for precipitation strengthening in Al-Cu-Mg alloys during non-isothermal heat treatments Poole, W.J., Wells, M.A. and Lloyd, D.J. (eds.) In Aluminium Alloys 2006: Innovation Through Research and Technology. Trans Tech., pp. 277-282.

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Description/Abstract

A multi-mechanistic model for microstructure development and strengthening during non-isothermal treatment of precipitation strengthened Al-Cu-Mg based alloys is derived. The formation kinetics of the precipitates is modelled using the Kampmann and Wagner numerical model that accounts for complete transformation from the nucleation to the coarsening stages. The increase in critical resolved shear strength of the grains due to the precipitates is based on two mechanisms i.e. modulus hardening mechanism for the shearable Cu:Mg co-clusters and the Orowan mechanism for the non-shearable S phase precipitates. The contributions due to solute and dislocation hardening are also incorporated. The model is verified by comparing the predicted results with differential scanning calorimetry and hardness data on 2024 aluminium alloys. The microstructural development and strength/hardness predictions of the model are in reasonable agreement with the experimental data and the differences are discussed in terms of requirements for further model development.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Series ISSN 0255-5476
ISBNs: 0878494081 (print)
ISSNs: 0255-5476 (print)
Venue - Dates: 10th International Conference on Aluminum Alloys, 2006-07-09 - 2006-07-13
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Keywords: precipitation, co-clusters, strength, welding, ageing
Subjects:
Organisations: Engineering Mats & Surface Engineerg Gp
ePrint ID: 41238
Date :
Date Event
2006Published
Date Deposited: 07 Aug 2006
Last Modified: 16 Apr 2017 19:03
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/41238

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