Grain Boundary Dynamics in High Magnetic Fields. Fundamentals and Implications for Materials Processing

Dmitri A. Molodov

doi:10.4028/www.scientific.net/MSF.467-470.697

Paper Titles

Simulating the Topology of Recrystallization in Stabilized Ferritic Stainless Steels
p.671

Modelling the Softening Behaviour of Commercial AlMn-Alloys
p.677

Microstructure Modeling as a Tool to Optimize Forging of Critical Aircraft Parts
p.683

Position Resolved In-Situ X-Ray Observation of Recrystallization and Its Description by Self-Organized Criticality
p.689

Grain Boundary Dynamics in High Magnetic Fields. Fundamentals and Implications for Materials Processing
p.697

Modeling the Impact of Grain Boundary Properties on Microstructural Evolution
p.707

Anisotropy in Grain Boundary Thermo-Kinetics: Atomic-Scale Computer Simulations
p.715

Five-Parameter Grain Boundary Character Distribution in Fe-1%Si
p.727

Effect of Anisotropic Interfacial Energy on Grain Boundary Distributions during Grain Growth
p.733

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Grain Boundary Dynamics in High Magnetic Fields. Fundamentals and Implications for Materials Processing

Abstract:

The latest research on dynamics of grain boundaries in non-magnetic materials in high magnetic fields is reviewed. A control of grain boundary migration means control of microstructure evolution, which is a key for the design of materials with desire properties. Grain boundary motion can be affected by a magnetic field, if the anisotropy of the magnetic susceptibility generates a gradient of the magnetic free energy. In contrast to curvature driven boundary motion, a magnetic driving force also acts on planar boundaries so that the motion of crystallographically well-defined boundaries can be investigated, and the true grain boundary mobility can be determined. The results of migration measurements obtained on bismuth and zinc bicrystals are addressed. Selective growth of new grains in locally deformed zinc single crystals driven by a magnetic force is reported as well. Implications for materials processing, in particular the effect of magnetic fields on texture development in hcp metals are finally discussed.