About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
|
Presentation Title |
Characterization of the Role of Lath Boundaries in Lath Martensitic Steel Using In-situ Micro-pillar Compression Tests |
Author(s) |
Ye-Eun Na, Hadi Ghaffarian, Dongchan Jang |
On-Site Speaker (Planned) |
Ye-Eun Na |
Abstract Scope |
Reduced-activation ferritic/martensitic (RAFM) steel is one of promising candidate materials for structural components of future nuclear energy systems. It is a type of lath martensite having hierarchical microstructure following Kurdjumov-Sachs orientation relationship. To fully understand mechanical behavior of lath martensitic steels, it is important to find out the role of each microstructural features. Until now, several studies have been done focusing on packet and block boundaries, i.e., high-angle grain boundaries (GBs). However, no in-depth study has been conducted on lath boundary, the most abundant feature in lath martensite. It is a low-angle GB known to consist of a periodic array of dislocations so it is expected to show different behaviors from other high-angle GBs. In this study, we made micro-pillars containing lath boundaries and performed in-situ compression tests accompanied by post-mortem SEM and TEM analysis. And we observed GB sliding along lath boundaries rather than lattice slip following Schmid’s law. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Nuclear Materials, Nanotechnology |