| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
Processing Materials for Properties
|
| Presentation Title |
Control Microstructures in Iron-based Alloys by Directional Recrystallization |
| Author(s) |
Z. W. Zhang, G. Chen, H. Bei, G. L. Chen, C. T. Liu |
| On-Site Speaker (Planned) |
Z. W. Zhang |
| Abstract Scope |
Microstructure with controlled grain structures can improve and/or enhance material properties. Directional recrystallization technique matches the requirement of simultaneously producing directional microstructure and enhancing material properties. For example, Directional recrystallization of an Fe–6.5wt%Si alloy was investigated by changing hot zone temperatures and growth rates. Elongated (columnar) grains with an aspect ratio more than 10 can be produced when growth parameters are carefully adjusted. In this study, we show a kinetic approach to model the growth of the columnar grains for Fe-based alloys. The aspect ratio of the columnar grains predicted by our model is in good agreement with experimental observation. The mechanism of the columnar gain growth essentially can be described as selective growth of grains or competitive migration of the grain boundaries.
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| Proceedings Inclusion? |
Definite: A CD-only volume |