Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7879980 | Acta Materialia | 2015 | 13 Pages |
Abstract
Microstructural evolution during non-isothermal annealing of a precipitation hardenable Al alloy is investigated experimentally, and simulated by developing a new Monte Carlo (MC) simulation technique. An annealing process that spans over a temperature range to promote the formation of a fine distribution of precipitates, is applied to a solution-treated Al-Mg-Si alloy. Experimental analysis of the deformed sample and samples non-isothermally annealed to intermediate temperatures reveals that early-stage precipitates inhibit dynamic recovery during deformation, as well as static recovery during the initial stages of annealing. Inhibition of recovery prior to the initiation of recrystallization leads to a high driving force for recrystallization and formation of randomly distributed recrystallized nuclei. Interactions of recovery, recrystallization and precipitations are integrated in the Monte Carlo algorithm and microstructural states during non-isothermal annealing are simulated. The MC technique is specifically designed for the systems in which precipitates inhibit dynamic recovery during the pre-annealing deformation stage. The good agreement achieved through comparison of MC simulation and experimental results supports the validity of the modeling technique developed.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
P. Sepehrband, X. Wang, H. Jin, S. Esmaeili,