Magnetic Field-assisted Crystallographic Selection During Grain Growth in Non-Magnetic Polycrystals: A Phase-Field Study
Abstract
Magnetic fields drive grain boundary migration in non-magnetic systems through anisotropic susceptibility, yet how the local orientation can affect the resulting collective grain growth behavior remains unclear. We employ a phase-field model to investigate magnetic-field-assisted grain growth in the diamagnetic Bi. This study provides a mechanistic basis for using static and dynamically varied magnetic fields to control texture development and grain growth kinetics in weakly magnetic materials. We also identify the conditions under which magnetic-field-driven orientation selection produces a distinct bimodal grain-size distribution. The bicrystal studies establish that boundary migration is governed by the magnetic free-energy difference between differently oriented grains, while polycrystalline field-sweep simulations reveal a transition from capillary-dominated coarsening to magnetically biased texture selection. For unbiased orientation distributions, magnetic selection remains distributed; however, when a small population of grains is strongly favored, the driving force localizes and exhibits bimodal coarsening characterized by enlarged favored grains embedded within a fine-grained matrix, even without grain boundary energy anisotropy, particle pinning, or heterogeneity. The field removal and field reorientation simulations further show that magnetic field history can redirect the coarsening pathway.
Related
- Manipulating the stability of crystallographic and magnetic sub-lattices: A first-order magnetoelastic transformation in transition metal based Laves phase
- High-charge collimated and energy-selected laser-driven MeV electron beams produced by magnetic selection
- AI-Assisted Identification of Magnetic Orders and Skyrmions
- A Systematic Measurement Study of Magnetoresistance Sensor Selection and Differential Configuration for Magnetic Nanoparticle Quantification
- High-temperature mechanical spectroscopy of yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) with different amounts of intergranular phase
BibTeX
@misc{maurya2026magnetic,
title = {{Magnetic Field-assisted Crystallographic Selection During Grain Growth in Non-Magnetic Polycrystals: A Phase-Field Study}},
author = {Rakesh Maurya and Soumya Bandyopadhyay and Somnath Bhowmick and Rajdip Mukherjee},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.23473},
eprint = {2610.23473},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.23473},
}
RIS
TY - UNPB
TI - Magnetic Field-assisted Crystallographic Selection During Grain Growth in Non-Magnetic Polycrystals: A Phase-Field Study
AU - Rakesh Maurya
AU - Soumya Bandyopadhyay
AU - Somnath Bhowmick
AU - Rajdip Mukherjee
PY - 2026
DA - 2026/10/16
PB - arXiv
DO - 10.48550/arxiv.2610.23473
UR - https://arxiv.org/abs/2610.23473
AB - Magnetic fields drive grain boundary migration in non-magnetic systems through anisotropic susceptibility, yet how the local orientation can affect the resulting collective grain growth behavior remains unclear. We employ a phase-field model to investigate magnetic-field-assisted grain growth in the diamagnetic Bi. This study provides a mechanistic basis for using static and dynamically varied magnetic fields to control texture development and grain growth kinetics in weakly magnetic materials. We also identify the conditions under which magnetic-field-driven orientation selection produces a distinct bimodal grain-size distribution. The bicrystal studies establish that boundary migration is governed by the magnetic free-energy difference between differently oriented grains, while polycrystalline field-sweep simulations reveal a transition from capillary-dominated coarsening to magnetically biased texture selection. For unbiased orientation distributions, magnetic selection remains distributed; however, when a small population of grains is strongly favored, the driving force localizes and exhibits bimodal coarsening characterized by enlarged favored grains embedded within a fine-grained matrix, even without grain boundary energy anisotropy, particle pinning, or heterogeneity. The field removal and field reorientation simulations further show that magnetic field history can redirect the coarsening pathway.
ER -