About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
A Continuum Mechanics Description of EBSD Misorientation Mapping |
Author(s) |
Shao-Shi Rui, Shaolou Wei, Hui-Ji Shi, Cemal Cem Tasan |
On-Site Speaker (Planned) |
Shao-Shi Rui |
Abstract Scope |
Electron backscatter diffraction (EBSD) based kernel averaged misorientation (KAM) and grain reference orientation deviation (GROD) maps are frequently used in the characterization of plastic deformation distribution and failure modules for metallic alloys under various service conditions. In this presentation, we will discuss their physical origin by combining theoretical considerations with integrated in-situ SEM/EBSD experiments. The main goal is to address the following questions: (i) What are the definitions of KAM and GROD from continuum mechanics perspective? (ii) What are the dislocation types and local deformation states that KAM and GROD quantitatively describe? (iii) How applicable are KAM and GROD in assessing the plastic deformation of single- and poly-crystalline metals? In addition, we will also discuss the feasibility of breaking down the KAM value into several sub-parameters to achieve more insights regarding local deformation states. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |