Projects
Electromagnetic Science of Materials (JSPS grant for fundamental research)
| Head of laboratory | Prof. Sadahiro TSUREKAWA (Kumamoto University) |
|---|---|
| Collaborative researchers | Prof. Hiroyuki KOKAWA (Tohoku University) Prof. Minoru NISHIDA (Kyushu University) Dr. Seiichiro II (National Institute for Materials Science) |
| Term of project | Academic years 2007－2011 (April 2007 - March 2011) |
Outline of survey
The mechanical and functional properties of materials depend significantly on their microstructure, so it is important to develop optimised microstructures to obtain desired materials properties. Traditionally, thermomechanical treatments have been applied to control microstructures in metallic materials. A new strategy for more precise control of microstructure by the application of a magnetic field during processing has recently been proposed (electromagnetic processing of materials, EPM). Extensive studies have demonstrated the effect of applied magnetic fields on many metallurgical phenomena such as recrystallization, phase transformation and precipitation. However, the origin of the magnetic field effects observed is not necessarily fully understood, and few reliable data are available on the influence of magnetic fields on fundamental phenomena such as diffusion and the energies of grain boundaries and interfaces. One main motivation of the current work is therefore to investigate the mechanism by which a magnetic field can exert an influence on such fundamental phenomena, and to generate basic data to help to elucidate the origin of the magnetic-field effects observed. A second is the application of EPM to practical materials processing.
Expected results
A key issue is to establish an “electromagnetic science of materials”, which will act as a guiding principle for EPM to enable innovation in this research field. The results obtained in the current study will contribute to this goal, and give some points of departure for the application of magnetic fields to practical materials processing to achieve enhanced properties and performance of materials through precise control of microstructures.
References by the principal researcher
- H. Fujii, S. Tsurekawa, T. Matsuzaki and T. Watanabe: Evolution of a sharp {110} texture in microcrystalline Fe78Si9B13 during magnetic crystallization from the amorphous phase, Phil. Mag. Lett., 86 (2006), 113 ~ 122.
- S. Tsurekawa, K. Okamoto, K. Kawahara and T. Watanabe: The Control of Grain Boundary Segregation and Segregation-Induced Brittleness in Iron by the Application of a Magnetic Field, J. Mater. Sci., 40 (2005), 895 ~ 901.
