Dr. Hashem Mousavi Anijdan
Dr. Hashem Mousavi Anijdan
Bonyad Melli Nokhbegan, Tehran (Iran's National Elites Foundation, Tehran, Iran), Iran
Title: Strategies for modeling of precipitation in Al-Mg-Si alloys
Different approaches for modeling of precipitation in Al-Mg-Si alloys will be reviewed. First of all, the importance of a precipitation modeling and its interrelations with other components in a process model are explained. Then the empirical, statistical, and physically-based modeling, with each being a different modeling approach, are introduced. The Kampmann-Wagner numerical (KWN) model, which is a physically-based finite difference method, is explained as a model which is able of capturing simultaneous nucleation, growth, and coarsening reactions. The growth kinetics in KWN model is based on the assumption of local equilibrium hypothesis, inferring that there is an immediate thermodynamic equilibrium as soon as two phases are in contact. This assumption implies the diffusion-controlled nature of the transformation. The other extreme approach is the assumption of interface-controlled growth, where the interface reaction (atom transport across the interface) controls the kinetics. In reality neither of these scenarios can be absolutely true. A modified version of KWN model, such that the growth can be treated with a mixed-mode nature (neither pure diffusion-controlled nor pure interface controlled) is introduced. Finally, how the geometry of precipitates can be incorporated into the precipitation model is also explained, as well.
Dr. Hashem Mousavi-Anijdan is with Bonyad Melli Nokhbegan of Iran (Iran's National Elites Foundation). Previously, he was a research scientist at Novelis Global Research and Technology center in Atlanta, United States. Prior to that a Materials science and engineering industrial –post doc researcher at Novelis Global Research and Technology Centre in Kingston, Canada. He holds a Master degree in Materials Science and Engineering from Sharif University of Technology in Iran and a PhD degree in Materials Engineering at McGill University in Canada. Dr. Anijdan has published numerous papers in peer-review journals, conference proceedings and the U.S patent, in the broad field of Materials Science and Engineering including more than 30 papers in journals indexed in the Web of Science – such as Acta Materialia, Metallurgical and Materials Transactions A, Materials Science and Engineering A, Computational Materials Science, Wear, Journal of Alloys and Compounds, Materials & Design and Materials letters. He has also written several chapter books in the field. Dr. Mousavi-Anijdan has participated in the scientific committee of several conferences (internal and internationals) and serves as a reviewer in a wide range of international journals. He is also an adviser in strategic planning for industrial development in Iran. Currently, his research interests are focused on hot deformation of metals, microstructure & electron microscopy, microstructure modeling, metal forming, physical and mechanical metallurgy, light alloys etc, where is he is mostly interested in solving problems of industrial applications.