[S1] S1 New Materials Science on Nanoscale Structures and Functions at Crystal Interface II

3:00 PM - 3:20 PM JST(6:00 AM - 6:20 AM UTC)

[S1.9] Grain Boundary Migration Processes in Steels Using STEM Observation and Theoretical Calculations

○Yuki Imai¹, Toshihiro Futazuka¹, Takehito Seki¹, Naoki Wada², Genki Tsukamoto², Nobusato Morishige², Naoya Shibata^1,3 (1. Institute of Engineering Innovation, School of Engineering, The University of Tokyo, 2. NIPPON STEEL, 3. Nanostructures Research Lab., JFCC)

Keywords:

Steel,Electron Microscopy,Molecular Dynamics,Incommensurate,Grain Boundary

Using magnetic-field-free STEM and calculations, we analyzed the atomic structure and dynamics of disconnections on the Σ9 grain boundary in grain-oriented electrical steel. We elucidated an incommensurate structure and revealed a unique migration mechanism.