About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
New Frontiers in Physical Metallurgy of Steels
|
| Presentation Title |
Surface Film-Induced Elastic Bending Modulates Core Loss in Non-Oriented Fe-Si alloy |
| Author(s) |
Jiheon Jeon, Younggun Park, Seonghyeon Yoo, Yongkeun Ahn, Chun Gu Kang, Ju-Young Kim |
| On-Site Speaker (Planned) |
Jiheon Jeon |
| Abstract Scope |
Reducing core loss in Fe–Si alloys is essential for improving electric motor performance. While bulk microstructural factors such as grain size and texture have been widely studied, surface-induced effects remain less explored. During final annealing, a surface oxide film forms, and upon cooling, thermal expansion mismatch between the film and substrate generates residual stress, inducing curvature. This results in tensile stress in the upper region and compressive stress in the lower region. These stresses do not cancel each other but independently influence magnetization; however, their combined effect has not been clearly elucidated. In this study, the surface film was removed by chemical etching to relax elastic bending stress, and the resulting changes in core loss were systematically analyzed using a Single Sheet Tester. Surface morphology and composition were characterized by SEM and EDS, and curvature was measured using laser microscopy. Micromagnetic simulations were further performed to investigate stress-dependent magnetization behavior. |