About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Dislocation Structures and Their Effect on Work-Hardening in Deformed High Purity Iron |
| Author(s) |
Wing Sum Lau, Shuhei Yoshida, Nobuhiro Tsuji |
| On-Site Speaker (Planned) |
Wing Sum Lau |
| Abstract Scope |
Work-hardening in metals occurs in plastic deformation and correlates with microstructural changes, including grain orientations and dislocation arrangements. In FCC metals, dislocation structures evolved under tension are known to be orientation-dependent and strongly correlated with work-hardening. In BCC metals, however, such relationships remain unclear due to limited quantitative analysis. In this study, we systematically investigated dislocation structures and their effect on work-hardening in polycrystalline high-purity BCC iron deformed by tension at room temperature. Dislocation structures at various strain levels were observed using electron channeling contrast imaging and electron backscatter diffraction in scanning electron microscopy. Three distinct types of dislocation structures were identified. We also calculated the contribution of dislocation structures to flow stress, based on measured dislocation cell sizes and misorientation angles. The agreement between calculated and experimental flow stress indicated that work-hardening in BCC iron is primarily governed by dislocation structures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Characterization, Mechanical Properties |